Reissig, R. <br/><br/>
Non-linear differential equations of higher order / 
R. Reissig, G. Sansone and R. Conti. 
 - Leyden :  Noordhoff International Publishing,  1974. 
 - 669 p. ;   23 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations, Nonlinear.