Guénaël Cabanes Dominique Fresneau Ugo Galassi Attilio Giordana Modeling Ant Activity by Means of Structured HMMs. 341-350 2009 ISMIS http://dx.doi.org/10.1007/978-3-642-04125-9_37 conf/ismis/2009 db/conf/ismis/ismis2009.html#CabanesFGG09