R. Rangarajan, P. Shashikala, and C. K. Honnegowda. “Certain Combinatorial Properties of Twin Triplets Related to Tchebychev Polynomials”. International Journal of Mathematics And its Applications 4, no. 4 (December 15, 2016): 1–10. Accessed December 8, 2025. https://ijmaa.in/index.php/ijmaa/article/view/949.