Šoltés, R., and E. Gregušková. “Bryomonitoring of Element Deposition in Three Walleys in the Tatra Mts (Slovakia) Based on X-Ray Spectrometry”. Oecologia Montana, Vol. 21, no. 1, June 2012, pp. 15-20, http://om.vuvb.uniza.sk/index.php/OM/article/view/234.