準フロベニウス環
For QF-1, QF-2, QF-3 rings:
Morita, Kiiti (1958), “On algebras for which every faithful representation is its own second commutator”, Math. Z. 69: 429–434, doi:10.1007/bf01187420, ISSN 0025-5874
Ringel, Claus Michael; Tachikawa, Hiroyuki (1974), “QF-3 rings”, J. Reine Angew. Math. 272: 49–72, ISSN 0075-4102
Thrall, R. M. (1948), “Some generalization of quasi-Frobenius algebras”, Trans. Amer. Math. Soc. 64: 173–183, doi:10.1090/s0002-9947-1948-0026048-0, ISSN 0002-9947