On a question regarding visibility of lattice points, II Sukumar Das Adhikari; Yong-Gao Chen — 1999 Acta Arithmetica
Davenport constant with weights and some related questions. Adhikari, Sukumar Das; Rath, Purusottam — 2006 Integers
Generalizations of some zero-sum theorems. Adhikari, Sukumar Das; David, Chantal; Jiménez Urroz, Jorge — 2008 Integers