@incollection{Fomin19,
author = {Vladimir Gladyshev and Igor Fomin},
title = {The Early Universe as a Source of Gravitational Waves},
booktitle = {Progress in Relativity},
publisher = {IntechOpen},
address = {Rijeka},
year = {2019},
editor = {Calin Gheorghe Buzea and Maricel Agop and Leo Butler},
chapter = {13},
doi = {10.5772/intechopen.87946},
url = {https://doi.org/10.5772/intechopen.87946}
}