@article{ author = {Abyar, E., Sadeghi, B., Mosslemin, M.H.}, title = {Preparation and Characterization of Nano-Feldspar/TiCl4 as a Novel Nanocatalyst and its Application for Synthesis of Dihydropyrano [2,3-b] Chromen Dione Derivatives}, journal = {}, year = {2020}, volume = {12}, number = {44}, pages = {275-282}, doi = {} }