@article{NCD_2007_11_1_a6,
     author = {Milo\v{s} Milovanovi\'c},
     title = {Digitization of the book the {Eternal} callender written by {Zacharius} {Orphelin}},
     journal = {Review of the National Center for Digitization},
     pages = {43 - 47},
     publisher = {mathdoc},
     volume = {11},
     number = {1},
     year = {2007},
     url = {http://geodesic.mathdoc.fr/item/NCD_2007_11_1_a6/}
}