ChemInform Abstract: An Efficient Construction of 4‐Oxo‐4H‐chromene‐2‐carboxylate Derivatives via One‐Pot Cascade Reaction under Solvent‐Free Conditions. Issue 39 (September 2015) - Huang, Chao; Guo, Jia‐Hui; Fu, Huang‐Mei; Yuan, Ming‐Long; Yang, Li‐Juan