King et al., RC (2006). A Dictionary of Genetics (7th edición). Oxford University Press. p. 129. ISBN978-0-19-530761-0. «Dominance [refers] to alleles that fully manifest their phenotype when present in the heterozygous ... state.»
Ridley, Matt (1999). «Disease». Genome: The Autobiography of a Species in 23 Chapters. Harper Collins. pp. 136-146. ISBN978-0-06-089408-5.