TY - JOUR AU - Kan Jiahai TI - Lower and upper bounds for the number of solutions of $p + h = P_{r}$ JO - Acta Arithmetica PY - 1990 SP - 237 EP - 248 VL - 56 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/aa-56-3-237-248/ DO - 10.4064/aa-56-3-237-248 LA - en ID - 10_4064_aa_56_3_237_248 ER -