Maintenance and replacement policy for a repairable multi-state system with regular preventive repairs
WU Wen-feng, SONG Jian-she, JIANG Ke-xia, LI Hao, YANG Ying-tao
Systems Engineering and Electronics . 2015, (6): 1319 -1324 .  DOI: 10.3969/j.issn.1001-506X.2015.06.15