On boundary value problem for semilinear degenerate elliptic differential equations
2011 ◽
Vol 19
(3)
◽
pp. 279-298
◽
1967 ◽
Vol 26
(1)
◽
pp. 68-82
◽
2013 ◽
Vol 33
(11/12)
◽
pp. 4967-4990
◽