@article{10_4064_aa_22_1_11_20,
     author = {Nina Spears},
     title = {A problem involving simultaneous binary compositions},
     journal = {Acta Arithmetica},
     pages = {11--20},
     publisher = {mathdoc},
     volume = {22},
     number = {1},
     year = {1972},
     doi = {10.4064/aa-22-1-11-20},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-22-1-11-20/}
}