Reissig, R., Sansone, G., & Conti, R. (1974). Νοn-linear differential equations of higher order. Noordhoff.
Chicago Style (17th ed.) CitationReissig, R., Giovanni Sansone, and R. Conti. Νοn-linear Differential Equations of Higher Order. Leyden: Noordhoff, 1974.
MLA (8th ed.) CitationReissig, R., et al. Νοn-linear Differential Equations of Higher Order. Noordhoff, 1974.
Warning: These citations may not always be 100% accurate.