On the determination of direct interchange areas in the calculation of radiant heat transfer of suspended particlesMikk, Ilmaran ASME publication1973 / 5 p https://www.ester.ee/record=b5716362*est Some problems of calculating radiant heat transfer in furnacesOts, Arvoan ASME publication1973 / 7 p. : ill https://www.ester.ee/record=b5718237*est