@article{10_37236_1331,
     author = {Walter Shur},
     title = {The {Last} {Digit} of ${2n \choose n}$ and $\sum {n \choose i}{2n-2i \choose n-i}$},
     journal = {The electronic journal of combinatorics},
     year = {1997},
     volume = {4},
     number = {2},
     doi = {10.37236/1331},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/1331/}
}