Sierra (2001). "The phenomenological stability of depersonalization: Comparing the old with the new". The Journal of Nervous and Mental Disease. 189 (9): 629-36. doi:10.1097/00005053-200109000-00010. PMID11580008.
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ncbi.nlm.nih.gov
Sierra (2001). "The phenomenological stability of depersonalization: Comparing the old with the new". The Journal of Nervous and Mental Disease. 189 (9): 629-36. doi:10.1097/00005053-200109000-00010. PMID11580008.