中国科学院数学与系统科学研究院期刊网
The Additive Hazard Mixing Models
Ping LI, Xiao-liang LING
Acta Mathematicae Applicatae Sinica(English Series) . 2012, (1): 139 -148 .  DOI: 10.1007/s10255-010-0022-1