@article{10_4064_cm117_2_2,
     author = {Maciej Ulas},
     title = {A note on {Sierpi\'nski's} problem related to triangular numbers},
     journal = {Colloquium Mathematicum},
     pages = {165--173},
     publisher = {mathdoc},
     volume = {117},
     number = {2},
     year = {2009},
     doi = {10.4064/cm117-2-2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm117-2-2/}
}