1. Aboitiz, F., Homology: A Comparative or a Historical Concept?, Acta Biotheor., 1988, vol. 37, no. 1, pp. 27–29.
2. Abouheif, E., Developmental Genetics and Homology: A Hierarchical Approach, Trends Ecol. Evol., 1997, vol. 10, no. 9, pp. 405–408.
3. Agnarsson, I. and Coddington, J.A., Quantitative Tests of Primary Homology, Cladistics, 2008, vol. 24, no. 1, pp. 51–61.
4. Antipenko, L.G., Problema nepolnoty teorii i ee gnoseologicheskoe znachenie (The Problem of Incompleteness of the Theory and Its Epistemological Significance), Moscow: Nauka, 1986.
5. Assis, L. and Brigandt, I., Homology: Homeostatic Property Cluster Kinds in Systematics and Evolution, Evol. Biol., 2009, vol. 36, no. 2, pp. 248–255.