Gyollai Ildikó;  Polgári Márta Piroska;  Biró Lóránt;  Vigh Tamás;  Kovács Tibor;  Pál-Molnár Elemér: Fossilized biomats as the possible source of high natural radionuclide content at the jurassic úrkút manganese ore deposit, Hungary.
  CARPATHIAN JOURNAL OF EARTH AND ENVIRONMENTAL SCIENCES, 13 (2).  pp. 477-487.  ISSN 1842-4090 (2018)