CSŰRÖS, Z., DEÁK, G., SALLAY, P. “INVESTIGATION OF THE PREPARATION OF 2,4,6-TRIARYL-PYRYLIUM FLUOROBORATES FROM AROMATIC ALDEHYDES AND ARYL METHYL KETONES. I. THIN LAYER CHROMATOGRAPHY TESTING OF THE REACTION”, Periodica Polytechnica Chemical Engineering, 16(1), pp. 3–6, 1972.