1. Meter for flowing mixtures of air and pulverised coal.;Carlson;Trans A.S.M.E.,1948
2. Bailey solids flow failure device.;Colliery Guardian,1957
3. Solid flow detector.;Engineering,1958
4. Improvements in or relating to method of and device for detecting stoppage in the flow of granular material. Brit. Pat. Spec. No. 695,498, 1953.
5. Detection of the movement of powder materials in pipes.;Barkov;Instr. Construc. (USSR) (Engl. Transl.),1962