Jose Shani; Sivakumar Koratti C.: Sub-direct sum of operators on Hilbert spaces and nonnegative Moore—Penrose inverses. In: Acta scientiarum mathematicarum, (81) 1-2. pp. 215-240. (2015)
Kulkarni S. H.; Sivakumar Koratti C.: Explicit solutions of a special class of linear programming problems in Banach spaces. In: Acta scientiarum mathematicarum, (62) 3-4. pp. 457-465. (1996)