@incollection{Vallée11,
author = {Robert Vallée},
title = {Duration, Systems and Cosmology},
booktitle = {Aspects of Today's Cosmology},
publisher = {IntechOpen},
address = {Rijeka},
year = {2011},
editor = {Antonio Alfonso-Faus},
chapter = {4},
doi = {10.5772/24763},
url = {https://doi.org/10.5772/24763}
}