@article{MuehleisenTacke1994,
  author    = {M. M{\"u}hleisen and Reinhold Tacke},
  title     = {Twofold deprotonated citric acid as a bidentate ligand of pentacoordinate silicon: synthesis and structural characterization of the zwitterionic \(\lambda_5\)Si-spirosilicate bis[citrato(2-)-O\(^3\),O\(^4\)][(dimethylammonio)methyl]silicate hydrate},
  year      = {1994},
}