@article{CTT100413770,
  author = {k. Suga and M. Fujihira and Y. Morita and T. Agawa},
  title = {Electrochemical Study on Calix[4]quinone and Calix[4]hydroquinone in N, N-Dimethylformamide..},
  journal = {Journal of Chemical Society Faraday Transactions},
  year = 1991,
}

@article{CTT100413790,
  author = {M. Fujihira and Y. Nakamura and Y. Hirata and U. Akiba and K. Suga},
  title = {Electrocatalytic Reduction of Carbon Dioxide by Nickel(II)Complexes of Cyclam and C-and N-Alkylated Cyclams.},
  journal = {DENKI KAKGAKU},
  year = 1991,
}