Function minimum associated to a congruence on integral n-tuple space. J.C. Rosales — 1995 Semigroup forum
On the Frobenius number of a proportionally modular Diophantine inequality. Delgado, M.; Rosales, J.C. — 2006 Portugaliae Mathematica. Nova Série
Finitely generated weakly reductive commutative semigroups. Rosales, J.C.; García-García, J.I. — 2002 Beiträge zur Algebra und Geometrie