共 50 条
- [1] CAUSALITY OF A WAVE-EQUATION AND INVARIANCE OF ITS HYPERBOLICITY CONDITIONS PHYSICAL REVIEW D, 1980, 22 (02): : 385 - 390
- [2] INVARIANCE OF THE WAVE-EQUATION UNDER GENERAL COORDINATE TRANSFORMATIONS NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA B-GENERAL PHYSICS RELATIVITY ASTRONOMY AND MATHEMATICAL PHYSICS AND METHODS, 1985, 86 (02): : 177 - 185
- [3] NEW PROPERTIES OF THE SPHEROIDAL WAVE-EQUATION LETTERE AL NUOVO CIMENTO, 1982, 35 (01): : 25 - 28