Andrisano-Ruggieri, Ruggero, et al. “Identification of Homogeneous Risk Classes in Work-Related Stress: A Methodological Proposal”. Rivista Di Psicologia Clinica , no. 2, Dec. 2016, pp. 69-98, https://quadernidipsicologiaclinica.com/index.php/rpc-archivio/article/view/1363.