Kamaku W, Mutembei J, Kivunge B. Positive P 0,1 Matrix Completion Problem for Order Four Digraphs with Zero, One, Two and Three Arcs. IJSBAR [Internet]. 2017 Jul. 15 [cited 2025 Oct. 4];34(3):22-30. Available from: https://gssrr.org/JournalOfBasicAndApplied/article/view/7671