Estimation of coke deposites in zeolite catalysts of different structure using the derivatography - Yu. H. Voloshyna; V. M. Solomakha; S. V. Konovalov; K. I. Patryliak; L. K. Patryliak; M. V. Okhrimenko; V. V. Ivanenko (Catalysis and Petrochemistry, 2012)