@incollection{Grenier21,
author = {Alain A. Grenier},
title = {From Eco to Sustainable Tourism, the Contradictions and Challenges of Nature-Based Tourism: The Case of Polar Cruises},
booktitle = {Tourism},
publisher = {IntechOpen},
address = {Rijeka},
year = {2021},
editor = {Syed Abdul Rehman Khan},
chapter = {2},
doi = {10.5772/intechopen.96914},
url = {https://doi.org/10.5772/intechopen.96914}
}