General solutions of certain nonlinear partial differential equations V. Lj. Kocić — 1977 Matematički Vesnik
Application of restricted Backlund transformation to linearization of second order nonlinear parabolic equation V. Lj. Kocić — 1985 Matematički Vesnik
Second Order Nonlinear Differential Equations Equivalent To Linear Differential Equations Jovan D. Kečkić; V. LJ. Kocić — 1978 Publications de l'Institut Mathématique