Miguel Bernal Antonio Sala Abdelhafidh Jaadari Thierry-Marie Guerra Stability analysis of polynomial fuzzy models via polynomial fuzzy Lyapunov functions. 5-14 2011 185 Fuzzy Sets and Systems 1 http://dx.doi.org/10.1016/j.fss.2011.07.008 db/journals/fss/fss185.html#BernalSJG11