@software{kaastra_2018_2272992, author = {Kaastra, J. S. and Raassen, A. J. J. and de Plaa, J. and Gu, Liyi}, title = {SPEX X-ray spectral fitting package}, month = dec, year = 2018, publisher = {Zenodo}, version = {3.04.00}, doi = {10.5281/zenodo.2272992}, url = {https://doi.org/10.5281/zenodo.2272992} }