@article{PDA_1970_2_1_a4,
     author = {Dragutin Djurovi\'c},
     title = {Relations {Parmi} les {Systemes} de {l'Heure} {Atomique} des {Ephemerides} et {Unlverselle} en 1968},
     journal = {Publications of the Department of Astronomy},
     pages = {29 - 33},
     publisher = {mathdoc},
     volume = {2},
     number = {1},
     year = {1970},
     url = {http://geodesic.mathdoc.fr/item/PDA_1970_2_1_a4/}
}