@article{10_4064_sm_11_1_200_236,
     author = {A. Alexiewicz},
     title = {On sequences of operations {(II)}},
     journal = {Studia Mathematica},
     pages = {200--236},
     publisher = {mathdoc},
     volume = {11},
     number = {1},
     year = {1950},
     doi = {10.4064/sm-11-1-200-236},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-11-1-200-236/}
}