Analytic Erdős-Turán conjectures and Erdős-Fuchs theorem. Haddad, L.; Helou, C.; Pihko, J. — 2005 International Journal of Mathematics and Mathematical Sciences
On a variant of the Erdős-Ginzburg-Ziv problem L. Gallardo; G. Grekos; J. Pihko — 1999 Acta Arithmetica
Representation functions, Sidon sets and bases G. Grekos; L. Haddad; C. Helou; J. Pihko — 2007 Acta Arithmetica