“Trees for Given Values of the Span, Caps and Icaps for L(2;1)-Colorings ”, K. Fogel; J. Villalpando; V. Coufal; R. Ray; K. Yerion; A. Higgins; W. Higgins Submitted to Congressus Numerantium.
“The Cardinality of the image of L(2;1)-Colorings and Irreducible L(2;1)-Colorings”, Coufal, Vesta; Ray, Robert; Villalpando, John; Yerion, Kathie, Congressus Numerantium, 220 (2014), pp. 97-108.
“Jordan Forms and nth Order Linear Recurrences.”, McKenzie, Thomas; Overbay, Shannon; Ray,Robert, Missouri Journal of Mathematical Sciences 26 (2014), no. 2, pp. 122-133
“G-Sets and Linear Recurrences Modulo Primes”, McKenzie, Thomas; Overbay, Shannon; Ray,Robert, Missouri Journal of Mathematical Sciences 25 (2013), no. 1 pp. 27-36
“Zonal Polynomials and Quantum Antisymmetric Matrices”, Naihuan Jing and Robert Ray, Bulletin of the Institute of Mathematics, Academia Sinica, Vol. 7, 2012, No. 1, pp. 1-31