If you use Nyx, we appreciate you citing the main code paper, Almgren et al. (2013) [PDF]
Citation in BibTeX:
@ARTICLE{Nyx,
author = {{Almgren}, A.~S. and {Bell}, J.~B. and {Lijewski}, M.~J. and {Luki{\'c}}, Z. and {Van Andel}, E.},
title = "{Nyx: A Massively Parallel AMR Code for Computational Cosmology}",
journal = {The Astrophysical Journal},
archivePrefix = "arXiv",
eprint = {1301.4498},
keywords = {gravitation, hydrodynamics, methods: numerical},
year = 2013,
month = mar,
volume = 765,
eid = {39},
pages = {39},
doi = {10.1088/0004-637X/765/1/39}
}