List of Articles Cellulose sulfuric acid Open Access Article Abstract Page Full-Text 1 - Cellulose sulfuric acid catalyzed multicomponent reaction for efficient synthesis of pyrimido and pyrazolo[4,5-b]quinolines under solvent-free conditions Seyyedeh Cobra Azimi Open Access Article Abstract Page Full-Text 2 - Cellulose sulfuric acid: an efficient biopolymer-based catalyst for the synthesis of 5H-dibenzo[b,i]xanthene-tetraones and spiro[dibenzo[b,i]xanthene-13,3'-indoline]-pentaones under solvent free conditions Seyyedeh Cobra Azimi Hassan Kefayati