@misc{AV_1930_1_4_a5,
     title = {Zpr\'avy},
     journal = {Aktu\'arsk\'e v\v{e}dy},
     pages = {181--188},
     year = {1930},
     volume = {1},
     number = {4},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/AV_1930_1_4_a5/}
}