Mottoni, Piero; Salvadori, Luigi De. <br/><br/>
Nonlinear differential equations :  invariance, stability and bifurcation / 
Piero; Salvadori, Luigi De Mottoni. 
 - [S.l.] :  Academic Press Inc.,U.S.,  1981. 
 - 1 v. (unpaged) 
<br/><br/><label>Dewey Class. No.: </label>515.355 MOT