Some Remarks on Positive Solutions of Nonlinear Problems at Resonance
The proof of a result of J.J. Nieto  appeared in "Acta Math. Hung." (1992) concerning the positive solutions of nonlinear problems at resonance is corrected and improved.
Nonlinear problems; Problems at resonance; Periodic solution; Positive solution
eISSN 0975-5748; pISSN 0974-875X