Evaluation of chitosan crystallinity: a high-resolution solid-state NMR spectroscopy approach - Facchinatto, William Marcondes; Santos, Danilo Martins dos; Fiamingo, Anderson; Bernardes Filho, Rubens; Campana Filho, Sergio Paulo; Azevêdo, Eduardo Ribeiro de; Colnago, Luiz Alberto (Carbohydrate Polymers, 2020)