1. On representations by Egyptian fractions;Ambro;Rev. Roum. Math. Pures Appl.,2015
2. On Kellogg's Diophantine problem;Curtis;Am. Math. Mon.,1922
3. Old and New Problems and Results in Combinatorial Number Theory;Erdős,1980
4. On a Diophantine problem;Kellogg;Am. Math. Mon.,1921
5. Groups possessing a small number of sets of conjugate operators;Miller;Trans. Am. Math. Soc.,1919