On parallel deletions applied to a word

Kari, Lila; Mateescu, Alexandru; Paun, Gheorghe; Salomaa, Arto

RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications, Volume 29 (1995) p. 129-144

PCP-prime words and primality types

Mateescu, Alexandru; Salomaa, Arto

RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications, Volume 27 (1993) p. 57-70