Sufficient conditions for the equation {$(a(t)x\sp{\prime} )\sp{\prime} +h(t,\,x,\,x\sp{\prime} )+q(t)f(x,\,x\sp{\prime} )=e(t,\,x,\,x\sp{\prime} )$}\ to be nonoscillatory

MR0385234 Graef, John R. and Spikes, Paul W. John R. GRAEF and Paul W. SPIKES Sufficient conditions for the equation {$(a(t)x\sp{\prime} )\sp{\prime} +h(t,\,x,\,x\sp{\prime} )+q(t)f(x,\,x\sp{\prime} )=e(t,\,x,\,x\sp{\prime} )$}\ to be nonoscillatory Funkcialaj Ekvacioj. Serio Internacia 18 1975 35--40 http://fe.math.kobe-u.ac.jp/FE/Free/vol18/fe18-1-5.pdf http://fe.math.kobe-u.ac.jp/FE/FE_pdf_with_bookmark/FE11-20-en_KML/fe18-035-040/fe18-035-040.pdf http://www.ams.org/mathscinet-getitem?mr=MR0385234 fe18-035-040 1975 Sufficient Conditions for the Equation $(a(t)x')'+h(t,x,x')+q(t)f(x,x')=e(t,x,x')$ to be Nonoscillatory GRAEF, John R.; SPIKES, Paul W. GRAEF, John R.; SPIKES, Paul W.

1 Graef, J. R.; Spikes, P. W. Continuability, boundedness and asymptotic behavior of solutions of $x''+q(t)f(x)=r(t)$ Ann. Mat. Pura Appl. 4 101 1974 307-320 MR0361274 Cache/Gr/Graef,x''+q(t)f(x)=r(t),Ann*,1974,1975

2 Graef, J. R.; Spikes, P. W. On the behavior of solutions of $x''+q(t)f(x)=r(t)$ Atti Accad. Naz. Lincei Rend. Cl. Sci. Fis. Mat. Natur (8) 54 1973 544-550 MR0369807 Cache/Gr/Graef,x''+q(t)f(x)=r(t),Atti*,1973,1974

3 Graef, J. R.; Spikes, P. W. A nonoscillation result for second order ordinary differential equations Rend. Accad. Sci. Fis. Mat. Napoli (4) 4 41 1974 92-101 MR0486795 100 Cache/Gr/Graef,nonoscillation,Rend*,1974,1975

4 Graef, J. R.; Spikes, P. W., Sufficient conditions for nonoscillation of a second order nonlinear differential equation, Proc. Amer. Math. Soc. 50 (1975), to appear MR0369808