Hîrtopanu Paulina; Scott P. W.; Andersen J. C.; Fairhurst R. J.; Chukanov N. V.; Jakab Gy.; Petrescu L.: Barum mineralization within the Tulgheş group, East Carpathians, Romania. In: Acta mineralogica-petrographica, (7). p. 55. (2012)