Bradley, B. J.;Pedersen, A.;Mundy, N. I.«Blue eyes in lemurs and humans: Same phenotype, different genetic mechanism».American Journal of Physical Anthropology,139,2,2009,p.269–273. Bibcode: 2009AJPA..139..269B. DOI: 10.1002/ajpa.21010. PMID: 19278018.
Sulem, Patrick;Gudbjartsson, Daniel F;Stacey, Simon N;Helgason, Agnar;Rafnar, Thorunn«Genetic determinants of hair, eye and skin pigmentation in Europeans».Nature Genetics,39,12,2007,p.1443–1452. Bibcode: 2007NaGen..39.1443S. DOI: 10.1038/ng.2007.13. PMID: 17952075.
Bradley, B. J.;Pedersen, A.;Mundy, N. I.«Blue eyes in lemurs and humans: Same phenotype, different genetic mechanism».American Journal of Physical Anthropology,139,2,2009,p.269–273. Bibcode: 2009AJPA..139..269B. DOI: 10.1002/ajpa.21010. PMID: 19278018.
Eiberg H, Mohr J«Assignment of genes coding for brown eye colour (BEY2) and brown hair colour (HCL3) on chromosome 15q».European Journal of Human Genetics,4,4,1996,p.237–241. DOI: 10.1159/000472205. PMID: 8875191.
Sulem, Patrick;Gudbjartsson, Daniel F;Stacey, Simon N;Helgason, Agnar;Rafnar, Thorunn«Genetic determinants of hair, eye and skin pigmentation in Europeans».Nature Genetics,39,12,2007,p.1443–1452. Bibcode: 2007NaGen..39.1443S. DOI: 10.1038/ng.2007.13. PMID: 17952075.
Webb, A. R.«Who, what, where, and when: influences on cutaneous vitamin D synthesis».Progress in Biophysics and Molecular Biology,92,1,2006,p.17–25. DOI: 10.1016/j.pbiomolbio.2006.02.004. PMID: 16766240.
Labrecque, Lauren I.;Milne, George R.«Exciting Red and Competent Blue: The Importance of Color in Marketing».Journal of the Academy of Marketing Science,40,5,2012,p.714. DOI: 10.1007/s11747-010-0245-y.«(Murray and Deabler 1957; Schaie 1961; Wexner 1954). Likewise, brown is a color that is related to seriousness, (Clarke and Costall 2007), reliability, and support (Fraser and Banks 2004; Mahnke 1996; Wright 1988).»
Bradley, B. J.;Pedersen, A.;Mundy, N. I.«Blue eyes in lemurs and humans: Same phenotype, different genetic mechanism».American Journal of Physical Anthropology,139,2,2009,p.269–273. Bibcode: 2009AJPA..139..269B. DOI: 10.1002/ajpa.21010. PMID: 19278018.
Eiberg H, Mohr J«Assignment of genes coding for brown eye colour (BEY2) and brown hair colour (HCL3) on chromosome 15q».European Journal of Human Genetics,4,4,1996,p.237–241. DOI: 10.1159/000472205. PMID: 8875191.
Sulem, Patrick;Gudbjartsson, Daniel F;Stacey, Simon N;Helgason, Agnar;Rafnar, Thorunn«Genetic determinants of hair, eye and skin pigmentation in Europeans».Nature Genetics,39,12,2007,p.1443–1452. Bibcode: 2007NaGen..39.1443S. DOI: 10.1038/ng.2007.13. PMID: 17952075.
Webb, A. R.«Who, what, where, and when: influences on cutaneous vitamin D synthesis».Progress in Biophysics and Molecular Biology,92,1,2006,p.17–25. DOI: 10.1016/j.pbiomolbio.2006.02.004. PMID: 16766240.
Jacobs, Karrie«Learning to Love Brown»(en anglès).The New York Times,20-04-1998[Consulta: 2 abril 2008].««Al principi eren de marró Pullman», va dir Peter Fredo, vicepresident de publicitat i relacions públiques d'UPS. [...] Els camions són marrons des del 1916. [...] «En aquell moment, era el súmmum del luxe i la classe.»»