ÖCALAN, Ö. 2006. Oscillation of difference equations with variable coefficients. Portugaliae Mathematica , vol.63, no.4 , 407-414.

ÖCALAN, Ö., (2006). Oscillation of difference equations with variable coefficients. Portugaliae Mathematica , vol.63, no.4, 407-414.

ÖCALAN, ÖZKAN. "Oscillation of difference equations with variable coefficients," Portugaliae Mathematica , vol.63, no.4, 407-414, 2006

ÖCALAN, ÖZKAN. "Oscillation of difference equations with variable coefficients." Portugaliae Mathematica , vol.63, no.4, pp.407-414, 2006

ÖCALAN, Ö. (2006) . "Oscillation of difference equations with variable coefficients." Portugaliae Mathematica , vol.63, no.4, pp.407-414.

@article{article, author={ÖZKAN ÖCAL}, title={Oscillation of difference equations with variable coefficients}, journal={Portugaliae Mathematica}, year=2006, pages={407-414} }