Leo Ojala Elina Parviainen Olli-Matti Penttinen Teemu Tynjälä Harriett Beaver Modeling Feynman's Serial Quantum Computer Using Stochastic Petri Nets. 1223-1229 2002 conf/pdpta/2002-3 PDPTA db/conf/pdpta/pdpta2002-3.html#OjalaPPTB02