%0 Journal Article %T Oscillation of solutions to second order linear differential equations %A Jan Seman %J Electronic Journal of Differential Equations %D 2004 %I Texas State University %X In this article, we establish conditions under which proper solutions of the second order linear differential equation $$ (r(t)y'(t))'+a(t)y(t)=0 $$ oscillate. The obtained results generalize, extend and improve the results in Dzurina [1]. %K Differential equation %K linear %K second order %K oscillation criteria %U http://ejde.math.txstate.edu/Volumes/2004/28/abstr.html