Jabr FI (September 2005). “Severe nail deformity. Nail biting may cause multiple adverse conditions”. 《Postgrad Med》 118 (3): 37–8, 42. doi:10.3810/pgm.2005.09.1712. PMID16201307.
Pacan, P; Reich, A; Grzesiak, M; Szepietowski, JC (2014년 2월 17일). “Onychophagia is Associated with Impairment of Quality of Life.”. 《Acta dermato-venereologica》 94: 703–6. doi:10.2340/00015555-1817. PMID24535041.
Jabr FI (September 2005). “Severe nail deformity. Nail biting may cause multiple adverse conditions”. 《Postgrad Med》 118 (3): 37–8, 42. doi:10.3810/pgm.2005.09.1712. PMID16201307.
Pacan, P; Reich, A; Grzesiak, M; Szepietowski, JC (2014년 2월 17일). “Onychophagia is Associated with Impairment of Quality of Life.”. 《Acta dermato-venereologica》 94: 703–6. doi:10.2340/00015555-1817. PMID24535041.