Ovsyannikov, L. V., & Ibragimov, N. H. (2013). Lectures on the theory of group properties of differential equations. Singapore: World Scientific Publishing Company.
Trích dẫn kiểu ChicagoOvsyannikov, L. V., và Nail H. Ibragimov. Lectures On the Theory of Group Properties of Differential Equations. Singapore: World Scientific Publishing Company, 2013.
Deismireacht MLAOvsyannikov, L. V., và Nail H. Ibragimov. Lectures On the Theory of Group Properties of Differential Equations. Singapore: World Scientific Publishing Company, 2013.
Rabhadh: D'fhéadfadh nach mbeadh na deismireachtaí seo 100% cruinn i gcónaí.