Phillip Helbig
"Is there a flatness problem in classical cosmology?"
in Relativity and Gravitation: 100 Years after Einstein in Prague
Jiří Bičák & Tomáš Ledvinka (eds.)
Heidelberg: Springer, pp. 555–561 (2014)
ISBN 978-3-319-06760-5 (print)
ISBN 978-3-319-06761-2 (online)
free, full, official version | doi:10.1007/978-3-319-06761-2_50 | ADS: 2014SPPhy.157..355H | Google Scholar