GENESIS AND GEOGRAPHY OF SOILS IN THE EASTERN SUDAN Статья ZONN S.V., TEZHANI E. Soviet Soil Science. Том 15. 1983. С. 12-29
DIFFERENTIAL-DIAGNOSIS OF PANCREATITIS BY QUANTITATIVE ASSESSMENT OF ECHOGRAMS Статья DVORYAKOVSKY I.V., LYABIS I.A., DVORYAKOVSKAYA G.M. Terapevticheskii Arkhiv. Том 55. 1983.