@book{ BA4089621X,
  author    = "Neumann, Bernhard Hermann and Neumann, P. M.",
  title     = "Special topics in algebra : universal algebra",
  publisher = "Courant Institute of Mathematical Sciences, New York University",
  year      = "1962",
  URL       = "https://ci.nii.ac.jp/ncid/BA4089621X"
}