中国科学院数学与系统科学研究院期刊网
ON THE NATURAL INTEGRAL EQUATION FOR INITIAL BOUNDARY VALUE PROBLEMS OF TWO DIMENSIONAL HYPERBOLIC EQUATION
Qi Kui DU, De Hao YV
Acta Mathematicae Applicatae Sinica . 2001, (1): 17 -026 .  DOI: 10.12387/C2001020