共 37 条
[2]
Atkinson F. V., 1955, PAC J MATH, V5, P643
[4]
Bharadwaj BVK, 2015, COMMUN MATH APPL, V6, P41
[6]
BRAYTON R. K., 1996, Q APPL MATH, V24, P224
[7]
Chern JL, 1996, PUBL MATH-DEBRECEN, V48, P209
[8]
DUB~E S. G., 2004, J DIFFER EQUATIONS, V2004, P1
[10]
El-Sheikh MMA, 2011, ADV DIFFER EQU CONTR, V8, P127