O jednoj klasi nelinearnih običnih diferencijalnih jednačina drugog reda Z. Starc — 1980 Matematički Vesnik
The boundary curves of three classes of the second order nonlinear ordinary differential equations Z. F. Starc — 1990 Matematički Vesnik
A note on the boundary curves of second order nonlinear differential equations Z. F. Starc — 1985 Matematički Vesnik