Yasui, T, A Tsukise, T Nara, Y Kuwahara, and W Meyer. 2009. “Morphological, Histochemical and Immunohistochemical Characterization of Secretory Production of the Ciliary Glands in the Porcine Eyelid”. European Journal of Histochemistry 50 (2):99-108. https://doi.org/10.4081/979.