Csűrös, Z., V. Kálmán, Á. Lengyel-Mészáros, and J. Petró. 1968. “STUDY OF THE CORRELATION BETWEEN STRUCTURE AND REDUCIBILITY OF ACETOPHENONE DERIVATIVES I. THE VALIDITY OF THE HAMMETTEQUATION IN THE MEERWEIN-PONNDROF-VERLEY REDUCTION OF ACETOPHENONE DERIVATIVES”. Periodica Polytechnica Chemical Engineering 12 (2):161-79.