@article{CM_1954-1956__12__217_0,
     author = {Halmos, Paul R.},
     title = {Algebraic logic, {I.} {Monadic} boolean algebras},
     journal = {Compositio Mathematica},
     pages = {217--249},
     publisher = {Kraus Reprint},
     volume = {12},
     year = {1954-1956},
     mrnumber = {78304},
     zbl = {0087.24505},
     language = {en},
     url = {http://www.numdam.org/item/CM_1954-1956__12__217_0/}
}