Luca Anselma Paolo Terenziani Stefania Montani Alessio Bottrighi Towards a comprehensive treatment of repetitions, periodicity and temporal constraints in clinical guidelines. 171-195 2006 38 Artificial Intelligence in Medicine 2 http://dx.doi.org/10.1016/j.artmed.2006.03.007 db/journals/artmed/artmed38.html#AnselmaTMB06