共 9 条
[1]
Barbu V., 1972, BOLL UNIONE MAT ITAL, V6, P270
[6]
Nagumo M., 1942, P PHYS MATH SOC JAPA, V24, P551
[8]
PIERRE M, 1976, THESIS U PARIS 6
[9]
Webb GF, 1972, J FUNCT ANAL, V10, P191, DOI 10.1016/0022-1236(72)90048-1