9.
KOLKER A. i in. 2009 – KOLKER, A. PANOV, B.S., PANOV, Y.B., LANDA, E.R., CONKO K.M., KORCHEMAGIN, V.M., SHENDRIK, T. i McCORD, J.D. 2009. Mercury and trace element contents of Donbas coals and associated mine water in the vicinity of Donetsk, Ukraine. International Journal of Coal Geology 79, s. 83–91.