Analytic Technique of Drillstem Failure Based on Support Vector Machine Technology and Clustering Theory. - Tie Yan; XueLiang Bi; Changjiang Wang (ICNC (1), 2007)

Gray Correlation Analysis Method and Its Application in Drill Stem Failure in Oil and Gas Engineering. - XueLiang Bi; Tie Yan; Lei Chang; Changjiang Wang (ICNC (6), 2008)

Grey correlation analysis and applications of drill stem failure in drilling engineering. - Tie Yan; Shuishan Feng; XueLiang Bi; Lei Chang (FSKD, 2010)