@techreport{MoellerStruth2006, author = {Bernhard M{\"o}ller and Georg Struth}, title = {Modal Kleene algebra and partial correctness}, institution = {Fakult{\"a}t f{\"u}r Angewandte Informatik}, series = {Reports / Technische Berichte der Fakult{\"a}t f{\"u}r Angewandte Informatik der Universit{\"a}t Augsburg}, number = {2003-08}, year = {2006}, }