中国科学院数学与系统科学研究院期刊网
THE REGULARITY OF THE SOLUTIONS OF NONLINEAR PARABOLIC OBSTACLE PROBLEMS FOR VECTOR-VALUED FUNCTIONS
Yang Xiao-ping
Acta Mathematicae Applicatae Sinica . 1990, (1): 6 -17 .  DOI: 10.12387/C1990002