Kasch bimodules D. N. Dikranjan, E. Gregorio, A. Orsatti (1991) Rendiconti del Seminario Matematico della Università di Padova
Krull-Gabriel dimension and Cantor-Bendixson rank of 1-domestic string algebras Gena Puninski (2012) Colloquium Mathematicae We prove that the Krull-Gabriel dimension of the category of modules over any 1-domestic non-degenerate string algebra is 3.