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Boogaard, A.; H. J. Geise; F. C. Mijlhoff (July 1972). "An electron diffraction investigation of the molecular structure of formic anhydride". Journal of Molecular Structure. 13 (1). Elsevier Science: 53–58. Bibcode:1972JMoSt..13...53B. doi:10.1016/0022-2860(72)87031-5.
