Ndago, Frank Omondi, Maurice Owino Oduor, and Michael Onyango Ojiema. “Analysis of Adjacency, Laplacian and Distance Matrices of Zero Divisor Graphs of 4-Radical Zero Completely Primary Finite Rings”. SCIENCE MUNDI 4, no. 2 (August 6, 2024): 61–80. Accessed November 7, 2025. https://sciencemundi.net/ojs/index.php/scimundi/article/view/55.