Wagner, H Former Department Comparative Neurobiology, Max Planck Institute for Biological Cybernetics, Max Planck Society; Max Planck Institute for Biological Cybernetics, Max Planck Society;
https://www.sciencedirect.com/science/article/pii/004269899290016C?via%3Dihub (Publisher version)
Schaeffel, F., & Wagner, H. (1992). Barn owls have symmetrical accommodation in both eyes, but independent pupillary responses to light. Vision Research, 32(6), 1149-1155. doi:10.1016/0042-6989(92)90016-C.