Birgit Engels Sven Oliver Krumke Rainer Schrader Christiane Zeck Integer Flow with Multipliers: The Special Case of Multipliers 1 and 2. 239-243 2009 CTW http://www.lix.polytechnique.fr/ctw09/ctw09-proceedings.pdf#page=251 conf/colognetwente/2009 db/conf/colognetwente/colognetwente2009.html#EngelsKSZ09