Egyptian fractions with restrictions Yong-Gao Chen, Christian Elsholtz, Li-Li Jiang (2012) Acta Arithmetica
Entropies of the partitions of the unit interval generated by the Farey tree Nikolai Moshchevitin, Anatoly Zhigljavsky (2004) Acta Arithmetica
Extensions of Three Theorems of Nagell A. Schinzel (2013) Bulletin of the Polish Academy of Sciences. Mathematics Three theorems of Nagell of 1923 concerning integer values of certain sums of fractions are extended.