Pascal Caron Jean-Marc Champarnaud Ludovic Mignot A New Family of Regular Operators Fitting with the Position Automaton Computation. 645-655 2009 SOFSEM https://doi.org/10.1007/978-3-540-95891-8_57 conf/sofsem/2009 db/conf/sofsem/sofsem2009.html#CaronCM09