Landsberg, Gary (2005). "Therapeutic agents for the treatment of cognitive dysfunction syndrome in senior dogs". Progress in Neuro-Psychopharmacology and Biological Psychiatry. 29 (3): 471–479. doi:10.1016/j.pnpbp.2004.12.012. PMID15795056. S2CID7671389.
Landsberg, Gary (2005). "Therapeutic agents for the treatment of cognitive dysfunction syndrome in senior dogs". Progress in Neuro-Psychopharmacology and Biological Psychiatry. 29 (3): 471–479. doi:10.1016/j.pnpbp.2004.12.012. PMID15795056. S2CID7671389.
Landsberg, Gary (2005). "Therapeutic agents for the treatment of cognitive dysfunction syndrome in senior dogs". Progress in Neuro-Psychopharmacology and Biological Psychiatry. 29 (3): 471–479. doi:10.1016/j.pnpbp.2004.12.012. PMID15795056. S2CID7671389.