The Pell Sequence of Order K, Multinomial Coefficients, and Probability Andreas N. Philippou; George N. Philippou — 1981 Δελτίο της Ελληνικής Μαθηματικής Εταιρίας
Fibonacci polynomials of order k, multinomial expansions and probability. Philippou, Andreas N.; Georghiou, Costas; Philippou, George N. — 1983 International Journal of Mathematics and Mathematical Sciences