(1) Kittappa, R., Complex Variables and Line Coordinates, Mathematics Magazine, 41-5, 1968, p 261-272.

(2) Kittappa, R., Transition Problems for the Helmholtz Equation, Airforce Office of Scientific Research, Arlington, VA, 1973.

(3) Kittappa, R. and Kleinman R. E., Acoustic Scattering by Penetrable Homogeneous Objects, Journal of Mathematical Physics, 16-2, 1975, p 421-432.

(4) Kittappa, R., Proof of a Conjecture of 1881 on Permanents, Linear and Multilinear Algebra, 10, 1981, p 75-82.

(5) Kittappa, R. Kit, A Generalization of the Rotation Matrix and Related Results, Linear Algebra and its Applications, 92, 1987, p 251-258.

(6) Kittappa, R. Kit, A Representation of the Solution of the nth order Linear Difference Equation with Variable Coefficients, Linear Algebra and Applications, 193, 1993, p 211-222.