Microwave-Assisted Synthesis of Novel 5-Substituted-2,3-dihydroimidazo[1,2-c]thieno[3,2-e]pyrimidines - Raghu Prasad, Mailavaram; Raghu Ram Rao, Akkinepalli; Shanthan Rao, Pamulaparthi; Subramanian Rajan, Kombu (Synthesis, 2001)