Bolekova, A., D. Kluchova, L. Tomasova, and N. Hvizdosova. “Effect of Retinoic Acid on the Nitrergic Innervation of Meibomian Glands in Rats”. European Journal of Histochemistry, vol. 56, no. 4, Nov. 2012, p. e50, doi:10.4081/ejh.2012.e50.