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  title={Contemporary communication systems using MATLAB and Simulink},

  author={Proakis, J.G. and Salehi, M. and Bauch, G.},

  isbn={9780534406172},

  lccn={31054410},

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  year={2004},

  publisher={Thomson--Brooks/Cole}

}

@book{oppenheim2010discrete,

  title={Discrete-time signal processing},

  author={Oppenheim, A.V. and Schafer, R.W.},

  isbn={9780131988422},

  series={Prentice-Hall signal processing series},

  url={http://books.google.at/books?id=mYsoAQAAMAAJ},

  year={2010},

  publisher={Prentice Hall}

}

@manual{wenzel2011system,

	title={The Isabelle System Manual},

	author={Wenzel, M. and Berghofer, S.},

	organization={TU Muenchen},

	year={2011},

	month={January}

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@Book{Nipkow-Paulson-Wenzel:2002,

  author	= {Tobias Nipkow and Lawrence C. Paulson and Markus Wenzel},

  title		= {{Isabelle/HOL} --- A Proof Assistant for Higher-Order Logic},

  publisher	= {Springer},

  series	= {LNCS},

  volume	= 2283,

  year		= 2002}

@Book{progr-mathematica,

  author = 	 {Maeder, Roman E.},

  title = 	 {Programming in Mathematica},

  publisher = 	 {Addison-Wesley},

  address = 	 {Reading, Mass.},

  year = 	 {1997}

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@Book{prog-maple06,

  author = 	 {Aladjav, Victor and Bogdevicius, Marijonas},

  title = 	 {Maple: Programming, Physical and Engineering Problems},

  publisher = 	 {Fultus Corporation},

  year = 	 {2006},

  month = 	 {February 27},

  annote = 	 {ISBN: 1596820802}

}

@Article{plmms10,

  author = 	 {Florian Haftmann and Cezary Kaliszyk and Walther Neuper},

  title = 	 {{CTP}-based programming languages~? Considerations about an experimental design},

  journal = 	 {ACM Communications in Computer Algebra},

  year = 	 {2010},

  volume = 	 {44},

  number = 	 {1/2},

  pages = 	 {27-41},

  month = 	 {March/June},

  note = 	 {http://www.ist.tugraz.at/projects/isac/publ/plmms-10.pdf}

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@inproceedings{casproto,

  author    = {Cezary Kaliszyk and

               Freek Wiedijk},

  title     = {Certified Computer Algebra on Top of an Interactive Theorem

               Prover},

  booktitle = {Calculemus},

  year      = {2007},

  pages     = {94-105},

  ee        = {http://dx.doi.org/10.1007/978-3-540-73086-6_8},

  crossref  = {DBLP:conf/mkm/2007},

  bibsource = {DBLP, http://dblp.uni-trier.de}

}

@InProceedings{wn:lucas-interp-12,

  author = 	 {Neuper, Walther},

  title = 	 {Automated Generation of User Guidance by Combining Computation and Deduction},

  booktitle = {THedu'11: CTP-compontents for educational software},

  year = 	 {2012},

  editor = 	 {Quaresma, Pedro},

  publisher = {EPTCS},

  note = {To appear}

}

@Manual{Huet_all:94,

  author = 	 {Huet, G. and Kahn, G. and  Paulin-Mohring, C.},

  title = 	 {The Coq Proof Assistant},

  institution =  {INRIA-Rocquencourt},

  year = 	 {1994},

  type = 	 {Tutorial},

  number = 	 {Version 5.10},

  address = 	 {CNRS-ENS Lyon},

  status={},source={Theorema},location={-}

}

@TECHREPORT{Back-SD09,

  author = {Back, Ralph-Johan},

  title = {Structured Derivations as a Unified Proof Style for Teaching Mathematics},

  institution = {TUCS - Turku Centre for Computer Science},

  year = {2009},

  type = {TUCS Technical Report},

  number = {949},

  address = {Turku, Finland},

  month = {July}

}

@InProceedings{ActiveMath-MAIN11,

  author = 	 {Melis, Erica and Siekmann, Jörg},

  title = 	 {An Intelligent Tutoring System for Mathematics},

  booktitle = {Seventh International Conference Artificial Intelligence and Soft Computing (ICAISC)},

  pages = 	 {91-101},

  year = 	 {2004},

  editor = 	 {Rutkowski, L. and Siekmann, J. and Tadeusiewicz, R. and Zadeh, L.A.},

  number = 	 {3070,},

  series = 	 {LNAI},

  publisher = {Springer-Verlag},

  doi =          {doi:10.1007/978-3-540-24844-6\_12}}

@TechReport{mat-tutor-cmu-MAIN11,

  author = 	 {John R. Anderson},

  title = 	 {Intelligent Tutoring and High School Mathematics},

  institution =  {Carnegie Mellon University, Department of Psychology},

  year = 	 {2008},

  type = 	 {Technical Report},

  number = 	 {20},

  note = 	 {http://repository.cmu.edu/psychology/20}

}

@PhdThesis{proof-strategies-11,

  author = 	 {Dietrich, Dominik},

  title = 	 {Proof Planning with Compiled Strategies},

  school = 	 {FR 6.2 Informatik, Saarland University},

  year = 	 {2011}

}

@proceedings{DBLP:conf/mkm/2007,

  editor    = {Manuel Kauers and

               Manfred Kerber and

               Robert Miner and

               Wolfgang Windsteiger},

  title     = {Towards Mechanized Mathematical Assistants, 14th Symposium,

               Calculemus 2007, 6th International Conference, MKM 2007,

               Hagenberg, Austria, June 27-30, 2007, Proceedings},

  booktitle = {Calculemus/MKM},

  publisher = {Springer},

  series    = {Lecture Notes in Computer Science},

  volume    = {4573},

  year      = {2007},

  isbn      = {978-3-540-73083-5},

  bibsource = {DBLP, http://dblp.uni-trier.de}

}