Petrovskii, I. G. <br/><br/>
Ordinary differential equations / 
by I. G. Petrovski ; translated and edited by Richard A. Silverman 
 - Englewood Cliffs, N.J :  Prentice-Hall ,  1966 
 - x, 232 p. :  ill. ;  24 cm. 
<br/><br/> Translation of: Lektsii po teorii obyknovennykh differentsialnykh uravneii. 
<br/><br/>p. 227. 
<br/><br/><label>LCCN: </label>66-018161 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations