Oleinik, O. A. <br/><br/>
Second order equations with nonnegative characteristic form / 
O. A. Oleinik and E. V. Radkevic ; translated [from the Russian] by Paul C. Fife 
 - Providence :  American Mathematical Society,  c1973 
 - vii, 259 p. ;  26 cm. 
<br/><br/> Translation of: Uravneniia vtorogo poriadka s neotritsatelnoi kharakteristicheskoi formoi 
<br/><br/>Bibliography : p. 251-259 
<br/><br/><label>ISBN: </label>0306307510 :  USD 20.00 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations, Partial<br/>Boundary value problems
<br/><br/><label>Dewey Class. No.: </label>517.383