A Novel One-Pot, Three-Component Synthesis of 5-Imino-2,3,5,8-tetrahydropyrazolo[1,2-a]pyridazin-1-one Derivatives - Qian, Bo; Fan, Ming-Jin; Xie, Yong-Xin; Wu, Lu-Yong; Shi, Yun; Liang, Yong-Min (Synthesis, 2009)