Knyihar-Csillik, E., Mihaly, A., Krisztin-Peva, B., Robotka, H., Szatmari, I., Fülöp, F., et al. (2008). The kynurenate analog SZR-72 prevents the nitroglycerol-induced increase of c-fos immunoreactivity in the rat caudal trigeminal nucleus: Comparative studies of the effects of SZR-72 and kynurenic acid. Neuroscience Research, 61(4), 429-432. doi:10.1016/j.neures.2008.04.009.