publicaciones seleccionadas artículo académico PRE-EXPANSIVITY IN CELLULAR AUTOMATA. THEORETICAL COMPUTER SCIENCE. 816:37-66. 2020 NONTRIVIAL TURMITES ARE TURING-UNIVERSAL. JOURNAL OF CELLULAR AUTOMATA. 13(5-6):373-392. 2018 SOME UNDECIDABLE PROBLEMS ABOUT THE TRACE-SUBSHIFT ASSOCIATED WITH A TURING MACHINE. DISCRETE MATHEMATICS AND THEORETICAL COMPUTER SCIENCE. 17(2):267-284. 2015 ON TIME-SYMMETRY IN CELLULAR AUTOMATA. JOURNAL OF COMPUTER AND SYSTEM SCIENCES. 78(4):1115-1126. 2012 LANGTON'S FLIES. JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL. 41:1-17. 2008 ON THE COMPLEXITY OF FEEDBACK SET PROBLEMS IN SIGNED DIGRAPHS. ELECTRONIC NOTES IN DISCRETE MATHEMATICS. 30(C):249-254. 2008 ONE HEAD MACHINES FROM A SYMBOLIC APPROACH. THEORETICAL COMPUTER SCIENCE. 370:34-47. 2007 CROSSING INFORMATION IN TWO-DIMENSIONAL SANDPILES. THEORETICAL COMPUTER SCIENCE. 369:463-469. 2006 A MEASURE OF SIMILARITY BETWEEN GRAPH VERTICES: APPLICATIONS TO SYNONUM EXTRACTION AND WEB SEARCHING. SIAM REVIEW. 46(4):647-666. 2004 DYNAMICS OF A CLASS OF ANTS ON A ONE-DIMENSIONAL LATTICE. THEORETICAL COMPUTER SCIENCE. 322:267-283. 2004