IsiBr Bras Psiquiatr. I-2006 Dec; 28 (4): 263-4.
URobinson HM, i-Hood SD, i-Bell CJ, i-Nutt DJ.
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Gunter De Win, MD, PhD
"Kunobufakazi obanele bokucabanga ukuthi izithombe zobulili ezingcolile zingathonya ukusebenza kocansi."
"Emaqenjini amancane, izigameko ezibikiwe zezinkinga ze-erectile ziyanda."
"Ngaphezu kwe-70% yeziguli ezinokusetshenziswa okuphezulu [kwezithombe ezingcolile zobulili ezingcolile] ...