Powers, David L..
Boundary Value Problems / - Second Ed. / - New York 10003 : Academic Press. - p.351 :
0-12-563760-8
Mathematics
B381:5 / L9;1
Boundary Value Problems / - Second Ed. / - New York 10003 : Academic Press. - p.351 :
0-12-563760-8
Mathematics
B381:5 / L9;1