共 12 条
[2]
Gaffney M.P., 1955, T AM MATH SOC, V78, P426
[3]
GARABEDIAN PR, 1952, T AM MATH SOC, V73, P223
[7]
KOHN JJ, ANN MATH
[10]
Nirenberg L., 1955, COMMUN PUR APPL MATH, V8, P648