@book{LNCS2283,author={Tobias Nipkow and Lawrence Paulson and Markus Wenzel},
title="Isabelle/HOL --- A Proof Assistant for Higher-Order Logic",
publisher=Springer,series=LNCS,volume=2283,year=2002,
note={\url{http://www.in.tum.de/~nipkow/LNCS2283/}}}

@inproceedings{Nipkow-MOD2001,author={Tobias Nipkow},
title={Hoare Logics in {Isabelle/HOL}},
booktitle={Proof and System-Reliability},
editor={H. Schwichtenberg and R. Steinbrüggen},
publisher={Kluwer},year=2002,pages={341-367}}

@inproceedings{Nipkow-CSL02,author={Tobias Nipkow},
title={Hoare Logics for Recursive Procedures and Unbounded Nondeterminism},
booktitle={Computer Science Logic (CSL 2002)},editor={J. Bradfield},
publisher=Springer,series=LNCS,volume=2471,pages={103-119},year=2002}

@inproceedings{Oheimb-FSTTCS99,author={Oheimb, David von},
title={Hoare Logic for Mutual Recursion and Local Variables},
booktitle={Foundations of Software Technology and Theoretical
           Computer Science (FST\&TCS)},
editor={C. Pandu Rangan and V. Raman and R. Ramanujam},
year=1999,publisher=Springer,series=LNCS,volume=1738,pages={168--180}}
