Please use the following to cite the Permafrost Benchmark System:
@misc{piper2018pbs,
author = {Piper, Mark}
title = {The Permafrost Benchmark System},
month = {August},
year = {2018},
doi = {10.5281/zenodo.1410621},
url = {https://dx.doi.org/10.5281/zenodo.1410621}
}