1. K. Buriev, Additive Problems with Prime Numbers. Ph.D. Thesis, Moscow State University (1989) (in Russian)
2. Y. Cai, On a Diophantine equation involving primes. Ramanujan J. (2018). https://doi.org/10.1007/s11139-018-0027-6
3. S.I. Dimirov, A Logarithmic Inequality Involving Prime Numbers. arXiv:1911.08865v5 [math.NT] 17 Dec (2019)
4. A. Karatsuba, Principles of the Analytic Number Theory (Nauka, Moscow, 1983) (in Russian)
5. A. Kumchev, T. Nedeva, On an equation with prime numbers. Acta Arith. 83, 117–126 (1998)