@article{JRAM_1966__222_150744,
     author = {Yehuda Rav},
     title = {On the representation of rational numbers as a sum of a fixed number of unit fractions.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {207--213},
     publisher = {mathdoc},
     volume = {222},
     year = {1966},
     zbl = {0141.04403},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1966__222_150744/}
}