Joep L. W. Kessels Gerrit den Besten Ad M. G. Peeters Torsten Kramer Volker Timm Applying Asynchronous Circuits in Contactless Smart Cards. 36-44 2000 conf/async/2000 ASYNC http://csdl.computer.org/comp/proceedings/async/2000/0586/00/05860036abs.htm db/conf/async/async2000.html#KesselsBPKT00