@incollection{Nielsen21,
author = {Hilde Dorthea Grindvik Nielsen},
title = {Introductory Chapter: Outdoor Recreation - Physiological and Psychological Effects on Health},
booktitle = {Outdoor Recreation},
publisher = {IntechOpen},
address = {Rijeka},
year = {2021},
editor = {Hilde G. Nielsen},
chapter = {1},
doi = {10.5772/intechopen.93887},
url = {https://doi.org/10.5772/intechopen.93887}
}