@article {45769,
	title = {Evolutionary biology. The problem of variation.},
	journal = {Nature},
	volume = {408},
	year = {2000},
	month = {2000 Nov 30},
	pages = {529, 531},
	keywords = {Animals, Biological Evolution, DNA, DNA-Binding Proteins, Drosophila melanogaster, Drosophila Proteins, Evolution, Molecular, Female, Gene Expression Regulation, Developmental, Genetic Variation, Male, Mutation, Pigmentation, Sex Characteristics, Sexual Behavior, Animal, Transcription Factors},
	issn = {0028-0836},
	doi = {10.1038/35046183},
	author = {Stern, D L}
}
