@article{10_4064_aa141_4_1,
     author = {Gautami Bhowmik and Jan-Christoph Schlage-Puchta},
     title = {An improvement on {Olson's} constant for $\mathbb Z_p\oplus \mathbb Z_p$},
     journal = {Acta Arithmetica},
     pages = {311--319},
     publisher = {mathdoc},
     volume = {141},
     number = {4},
     year = {2010},
     doi = {10.4064/aa141-4-1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa141-4-1/}
}