Gibuła-Bruzda, E.; Marszałek, M.; Witkowska, E.; Kotlińska, J. H. Analgesic Effects of Deltorphin Analogues EW1 and EW2 in Tail-Immersion Test in Mice. Curr. Issues Pharm. Med. Sci. 2013, 26 (4), 448-452. https://doi.org/10.12923/j.2084-980X/26.4/a.22.