@article{AUCMP_2005__46_Suppl_a20,
     author = {PustyInik, Izold},
     title = {Petzval astrograph of {Tartu} observatory},
     journal = {Acta Universitatis Carolinae. Mathematica et Physica},
     pages = {233--238},
     publisher = {mathdoc},
     volume = {46},
     number = {Suppl},
     year = {2005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUCMP_2005__46_Suppl_a20/}
}