Dubickas, A. (1999) “On Waring’s problem for a prime modulus”, Nonlinear Analysis: Modelling and Control, 4(1), pp. 23–30. doi:10.15388/NA.1999.4.0.15248.
We obtain a lower bound for the minimum over positive integers such that the sum of certain powers of some integers is divisible by a prime number, but none of these integers is divisible by this prime number.