Baker, H G (1959). "Reproductive methods as factors in speciation in flowering plants". Cold Spring Harb Symp quant Biol. 24: 177–191. doi:10.1101/sqb.1959.024.01.019. PMID13796002.
Barton N., Bengtsson B. O. (1986), "The barrier to genetic exchange between hybridising populations", Heredity, 57 (3): 357–376, doi:10.1038/hdy.1986.135, PMID3804765.
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Baker, H G (1959). "Reproductive methods as factors in speciation in flowering plants". Cold Spring Harb Symp quant Biol. 24: 177–191. doi:10.1101/sqb.1959.024.01.019. PMID13796002.
Barton N., Bengtsson B. O. (1986), "The barrier to genetic exchange between hybridising populations", Heredity, 57 (3): 357–376, doi:10.1038/hdy.1986.135, PMID3804765.