@article{10_4064_cm_25_2_319_324,
     author = {Robert J. Weaver},
     title = {Admissible operations on sample spaces over the free orthogonality monoid},
     journal = {Colloquium Mathematicum},
     pages = {319--324},
     publisher = {mathdoc},
     volume = {25},
     number = {2},
     year = {1972},
     doi = {10.4064/cm-25-2-319-324},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-25-2-319-324/}
}