One-Pot Synthesis of 9H-Indolo[3,2-c]pyrazolo[1,5-a]quinolines, 1H-Dipyrazolo[1,5-a:4′,3′-c]quinolines and 1H-Imidazo[4,5-c]pyrazolo[1,5-a]quinolines: Three New Heterocyclic Systems - Zhang, Yiming; Wang, Ren; Shi, Zongjun; Zhang, Wei (Synthesis, 2011)