MOSTAFA, B.; HABIBI-KHORASSANI, S. M.; SHAHRAKI, M. KINETIC ASPECTS OF 3, 4 dihydropyrano[c]chromenes FORMATION IN THE PRESENCE OF DIFFERENT CATALYSTS: A MECHANISTIC INVESTIGATION. Journal of Applied Chemical Science International, v. 5, n. 3, p. 121-133, 12 nov. 2015.