1. Beklemishev, V.N., Osnovy sravnitel’noi anatomii bespozvonochnykh (Foundations of Comparative Anatomy of Invertebrates), vol. 1: Promorfologiya (Promorphology), Moscow: Nauka, 1964.
2. Beloussov L.V. Biologicheskiy morfogenez (Biological Morphogenesis), Moscow: Mosk. Gos. Univ., 1987.
3. Blyakher, L.Ya., Problemy morfologii zhivotnykh (Problems in Animal Morphology), Moscow: Nauka, 1976.
4. Chang, Ch.-H., Jiang, T.-X., Lin, C.-M., et al., Distinctive Phenotypes Generated by WNT Member Misexpression during Hierarchical Morphogenesis of Dermis, Skin Regions and Individual Feathers, Mech. Dev., 2004a, vol. 121, pp. 157–171.
5. Chang, Ch.-H., Yu, M., Wu, P., et al., Sculpting Skin Appendages Out of Epidermal Layers via Temporally and Spatially Regulated Apoptotic Events, J. Invest. Dermatol., 2004b, vol. 122, pp. 1348–1355.