Wacharong Wongsanurak. 2009. Oscillation criteria for second order nonlinear differential equations with damping. Faculty of Science, Chiang Mai University;
Wacharong Wongsanurak. (2009) Oscillation criteria for second order nonlinear differential equations with damping . Chiang Mai University/Chiang Mai.
Wacharong Wongsanurak. Oscillation criteria for second order nonlinear differential equations with damping. . Chiang Mai:Chiang Mai University, 2009.
Wacharong Wongsanurak. (2009) Oscillation criteria for second order nonlinear differential equations with damping . Chiang Mai University/Chiang Mai.