HafiziH., AlikoA., SharraE., FicoA., MiglioriG. B., CastigliaP., and SotgiuG. “Results of a Tuberculin Skin Testing Survey in Albania”. The Journal of Infection in Developing Countries, Vol. 8, no. 03, Mar. 2014, pp. 310-4, doi:10.3855/jidc.3391.