Chrusciel E. In situ measurement of ASH content by neutron activation analysis / E.Chrusciel,J.L.Makhabane,K.Palka, 1991. - 27 p. - Текст : непосредственный.
Chrusciel E. Application of neutron - induced gamma ray spectrometry for in situ assessment of coal quality / E.Chrusciel,J.L.Makhabane, 1990. - 30 p. - Текст : непосредственный.