TY - JOUR AU - Schwarz, Štefan TI - An unconventional problem in the elementary theory of numbers JO - Czechoslovak Mathematical Journal PY - 1981 SP - 159 EP - 169 VL - 31 IS - 1 PB - mathdoc UR - https://geodesic-test.mathdoc.fr/articles/10.21136/CMJ.1981.101733/ DO - 10.21136/CMJ.1981.101733 LA - en ID - 10_21136_CMJ_1981_101733 ER -