Dunn, I. C.; Paton, I. R.; Clelland, A. K.; Sebastian, S.; Johnson, E. J.; et al. (May 2011). "The chicken polydactyly (Po) locus causes allelic imbalance and ectopic expression of Shh during limb development". Developmental Dynamics. 240 (5): 1163–1172. doi:10.1002/dvdy.22623. PMID21465618. S2CID9641673.
Dunn, I. C.; Paton, I. R.; Clelland, A. K.; Sebastian, S.; Johnson, E. J.; et al. (May 2011). "The chicken polydactyly (Po) locus causes allelic imbalance and ectopic expression of Shh during limb development". Developmental Dynamics. 240 (5): 1163–1172. doi:10.1002/dvdy.22623. PMID21465618. S2CID9641673.
Dunn, I. C.; Paton, I. R.; Clelland, A. K.; Sebastian, S.; Johnson, E. J.; et al. (May 2011). "The chicken polydactyly (Po) locus causes allelic imbalance and ectopic expression of Shh during limb development". Developmental Dynamics. 240 (5): 1163–1172. doi:10.1002/dvdy.22623. PMID21465618. S2CID9641673.