Elsgolts, Lev Ernestovich. <br/><br/>
Differential equations 

 - Nueva Dheli :   Hindustan,   1961. 
 - International monographs on advan .
<br/><br/><label>Subjects--Topical Terms: </label><br/>ECUACIONES DIFERENCIALES
<br/><br/><label>Universal Decimal Class. No.: </label>517.9