A. Skowronski et G. Zwara, Degeneration-like orders on the additive categories of generalized standard Auslander-Reiten components, ARCH MATH, 74(1), 2000, pp. 11-21
We study degeneration-like orders on the additive categories of pairwise or
thogonal generalized standard components of the Auslander-Reiten quivers of
artin algebras.