共 9 条
[2]
COURANT R, 1962, METHODS MATH PHYSICS, V2
[3]
HOPF H, 1956, LECTURES DIFFERENTIA
[5]
Loewner C., 1974, CONTRIBUTIONS ANAL, P245
[6]
Obata M., 1971, J DIFFER GEOM, V6, P247
[7]
Protter Murray H., 1984, MAXIMUM PRINCIPLES D, DOI [10.1007/978-1-4612-5282-5, DOI 10.1007/978-1-4612-5282-5]
[8]
SERRIN J, 1971, ARCH RATIONAL MECH A, V43, P304
[9]
Wilczek F., 1977, QUARK CONFINEMENT FI