Barton, N. H. (1997). Population genetics: A new apportionment of human diversity. Current Biology. Cell Press.https://doi.org/10.1016/S0960-9822(06)00397-6 
LibreCat: https://research-explorer.ista.ac.at/record/4289
DOI: 10.1016/S0960-9822(06)00397-6

Barton, N. H. (1996). Speciation: more than the sum of its parts. In Current Biology (Vol. 6, pp. 1244–1246). Cell Press.https://doi.org/10.1016/S0960-9822(02)70707-0 
LibreCat: https://research-explorer.ista.ac.at/record/4295
DOI: 10.1016/S0960-9822(02)70707-0
PMID: 8939554

Barton, N. H. (1993). Why species and subspecies? Current Biology. Cell Press.https://doi.org/10.1016/0960-9822(93)90036-N 
LibreCat: https://research-explorer.ista.ac.at/record/4304
DOI: 10.1016/0960-9822(93)90036-N