@article{10_4064_cm_36_1_43_48,
     author = {G. S. Stoller},
     title = {Three problems of {S.} {M.} {Ulam} with solutions and generalizations},
     journal = {Colloquium Mathematicum},
     pages = {43--48},
     publisher = {mathdoc},
     volume = {36},
     number = {1},
     year = {1976},
     doi = {10.4064/cm-36-1-43-48},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-36-1-43-48/}
}