Abaszadeh, Mehdi, Seifi, Mohammad, Ghashang, Majid. Multi-component preparation of diethyl/methyl 1,3-diaryl-1,2,3,6-tetrahydro-pyrimidine-4,5-dicarboxylates using hydrated phosphomolybdic acid as an efficient catalyst. Iranian Journal of Catalysis. 2015;5(2):113-117. doi: