Sven Skyum. Nonterminals and Codings in Defining Variations of 0L-Systems. In Grzegorz Rozenberg, Arto Salomaa, editors, L Systems, Most of the papers were presented at a conference in Aarhus, Denmark, January 14-25, 1974. Volume 15 of Lecture Notes in Computer Science, pages 244-249, Springer, 1974.
Abstract is missing.