@article{AV_1936__6_1_a2,
     author = {Steffensen, J. F.},
     title = {Zur {Theorie} der {Invalidit\"atstafel}},
     journal = {Aktu\'arsk\'e v\v{e}dy},
     pages = {1--9},
     publisher = {mathdoc},
     volume = {06},
     number = {1},
     year = {1936},
     language = {ge},
     url = {http://geodesic.mathdoc.fr/item/AV_1936__6_1_a2/}
}