Asymmetric HMMs for Online Ball-Bearing Health Assessments. - Carlos Puerto-Santana; Concha Bielza; Javier Diaz-Rozo; Guillem Ramirez-Gargallo; Filippo Mantovani; Gaizka Virumbrales; Jesús Labarta; Pedro Larrañaga (IEEE Internet Things J., 2022)