MINERAL-COMPOSITION OF VOLCANIC SOILS IN THE TROPICAL REGION OF COSTA-RICA Статья GOMEZ V.O., CHERNYAKHOVSKIY A.G., CHIZHIKOVA N.P., SHCHURYGINA Y.A., GRADUSOV B.P. Soviet Soil Science. Том 13. 1981. С. 95-102
EXACT STATISTICAL RELATIONS FOR SUSCEPTIBILITIES AND CONDUCTIVITIES Статья TANG N. Theoretical and Mathematical Physics. Том 47. 1981. С. 507-513