@article{NCD_2007_10_1_a7,
     author = {Sonja Vidojevi\'c and Stevo \v{S}egan},
     title = {Observational forms of {Astronomical} {Observatory} in {Belgrade}},
     journal = {Review of the National Center for Digitization},
     pages = {59 - 64},
     publisher = {mathdoc},
     volume = {10},
     number = {1},
     year = {2007},
     url = {http://geodesic.mathdoc.fr/item/NCD_2007_10_1_a7/}
}