Citation: Fratini, Albert V.; Cross, Elisa M.; O'brien, Joseph F.; Adams, W. Wade (1985). The structure of poly-2,5-benzoxazole (ABPBO) and poly-2,6-benzothiazole (ABPBT) fibers by X-ray diffraction. Journal of Macromolecular Science, Part B, 24, pp. 159-179.