Gilbarg, David <br/><br/>
Elliptic partial differential equations of second order 
David Gilburg, Neil S. Trudinger 
 - 2nd ed. 
 - Berlin  Springer  1983 
 - xiii, 513p. 
 - Grumdlehren der methenatischen Wissenschaften  24 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations, Elliptic