{{Cite journal| doi = 10.1007/s10845-017-1375-6| volume = 30| issue = 5| pages = 2157–2170| last1 = Benmahdi| first1 = D.| last2 = Rasolofondraibe| first2 = L.| last3 = Chiementin| first3 = X.| last4 = Murer| first4 = S.| last5 = Felkaoui| first5 = A.| title = RT-OPTICS: real-time classification based on OPTICS method to monitor bearings faults| journal = Journal of Intelligent Manufacturing| date = 2019}}