S. Rahate, A. et al. 2020. Silicotungstic Acid Catalyzed Microwave Assisted Synthesis of Fused 4H-Pyrimido[2,1-b]thiazoles and 4H-Pyrimido[2,1-b]benzothiazoles under Solvent-Free Conditions. Asian Journal of Organic & Medicinal Chemistry. 5, 1 (May 2020), 62–67. DOI:https://doi.org/10.14233/ajomc.2020.AJOMC-P236.