Christian Martel Laurence Vignollet Christine Ferraris Emmanuelle Villiot-Leclercq Salim Ouari PPdesigner: An Editor for Pedagogical Procedures. 379-384 2009 EC-TEL http://dx.doi.org/10.1007/978-3-642-04636-0_36 conf/ectel/2009 db/conf/ectel/ectel2009.html#MartelVFVO09