@article{Constantin:2015EE, author = "Constantin, Diana-Rodica and Verebelyi, Erika", title = "{Gravitational Redshift in the post-Newtonian potential field: The Schwarzschild Problem}", doi = "10.22323/1.204.0079", journal = "PoS", year = 2015, volume = "NIC XIII", pages = "079" }