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[2]      Á. Somogyi, P. Császár, Z. Dinya, and A. G. Császár, Theoretical Force Fields and Vibrational Spectra of 4H-Pyran-4-one by CNDO/2 and MINDO/3 Force Methods, J. Mol. Struct. (THEOCHEM), 1987, 151, 29-37. https://doi.org/10.1016/0166-1280(87)85042-X [PDF (594 kB)]