Processing of high-grade zeolite nanocomposites from solid fuel combustion by-products as critical raw materials substitutesSilviya Boycheva, Denitza Zgureva, Hristina Lazarova, Katerina Lazarova, Cyril Popov, Tsvetanka Babeva and Margarita PopovaManufacturing Rev., 7 (2020) 22DOI: https://doi.org/10.1051/mfreview/2020019