Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) G. J. Hoijtink and E. de Boer and P. H. van der Meij and W. P. Weijland,Properties of uni‐ and bivalent anions of conjugated hydrocarbons: Preliminary Communication,Recueil des Travaux Chimiques des Pays-Bas,0165-0513,Wiley,1955-01,74,3,277-279,https://cir.nii.ac.jp/crid/1363670318509025792,https://doi.org/10.1002/recl.19550740304