N. Thiruniraiselvi & M. A. Gopalan 2024. Characterizations of Pythagorean Triangles in Relation to Special Dhuruva Numbers of Orders Four and Six. Mathematics and Computer Science: Contemporary Developments Vol. 4. (Sep. 2024), 137–150. DOI:https://doi.org/10.9734/bpi/mcscd/v4/1970.