1. CASTILLO, R. C.: A survey on triangular number, factorial and some associated numbers, Indian J. Sci. Technol. 9(41) (2016), 1–7.
2. COBB, S. — PATTERSON, N. — LEMMA, M.: The fascinating mathematical beauty of triangular numbers, GA J. Sci. 66(2) (2008), Art. No. 9.
3. GARGE, A. S. — SHIRALI, S. A.: Triangular numbers, Reson 17 (2012), 672–681.
4. HOGGATT JR, V. E. — BICKNELL, M.: Generalized Fibonacci polynomials, Fibonacci Quart. 11(5) (1973), 457–465.
5. HOGGATT JR, V. E. — BICKNELL, M.: Triangular numbers, Fibonacci Quart. 12(3) (1974), 221–230.