Paths in graphs and minimal π-sequences in semigroups. - Mohan S. Putcha (Discret. Math., 1975)

Parabolic Subgroups and Cuspidal Representations of Finite Monoids. - Jan Okninski; Mohan S. Putcha (Int. J. Algebra Comput., 1991)

Monoids with Idempotent Cross-Sections. - Mohan S. Putcha (Int. J. Algebra Comput., 2001)

Parabolic Monoids I: Structure. - Mohan S. Putcha (Int. J. Algebra Comput., 2006)

Root Semigroups in reductive Monoids. - Mohan S. Putcha (Int. J. Algebra Comput., 2011)