Arturo Carpi, Aldo de Luca. Repetitions and Boxes in Words and Pictures. In Juhani Karhumäki, Hermann A. Maurer, Gheorghe Paun, Grzegorz Rozenberg, editors, Jewels are Forever, Contributions on Theoretical Computer Science in Honor of Arto Salomaa. pages 295-306, Springer, 1999.
Abstract is missing.