Language classes defined by time-bounded relativised cellular automata Meena Mahajan, Kamala Krithivasan (1993) RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications
Limit behaviour of trajectories involving subgradients of convex functions Jan Pelant, Svatopluk Poljak, Daniel Turzík (1987) Commentationes Mathematicae Universitatis Carolinae