Minimal rankings. - J. Ghoshal; Renu C. Laskar; Dan Pillone (Networks, 1996)

Further Results on Minimal Rankings. - J. Ghoshal; Renu C. Laskar; Dan Pillone (Ars Comb., 1999)

Minimal rankings of the Cartesian product Kn Box Km. - Gilbert Eyabi; Jobby Jacob; Renu C. Laskar; Darren A. Narayan; Dan Pillone (Discuss. Math. Graph Theory, 2012)

Arankings of trees. - Dan Pillone (Discuss. Math. Graph Theory, 2019)