A Convenient One-Pot Synthesis of Pyrano[3,2-c]quinolin-2,5(6H)-dione and 2H,5H-Pyrano[3,2-c]chromene-2,5-dione Derivatives - Sheibani, Hassan; Mosslemin, Mohammad Hossein; Behzadi, Soheila; Islami, Mohammad Reza; Saidi, Kazem (Synthesis, 2006)