SALM UDANI , SSN PERERA
Journal of Global Economics, Management and Business Research 8 ( 3) 149 -145
NK HAPUKOTUWA , S PERERA
Annals of Sri Lanka Department of Agriculture 19 104 -111
P Chathura Jayampathi De Silva , RM Herath , LM Chandrawathi , S Perera
SRI LANKA JOURNAL OF AGRARIAN STUDIES 41 -41
Naleen Chaminda Ganegoda ,
Applied and Computational Mathematics 5 ( 4) 169 -176