Gawełko, J., Cierpiał-Wolan, M., Podgórska-Bednarz, J. and Kawecki, A. 2017. Morbidity trend of lip cancer in Podkarpacie and in Poland in the years 1963–2013. European Journal of Clinical and Experimental Medicine. 15, 1 (Mar. 2017), 32–38. DOI:https://doi.org/10.15584/ejcem.2017.1.5.