X-ray orbital modulation of a white dwarf accreting from an L dwarf - The system SDSS J121209.31+013627.7B. Stelzer, D. de Martino, S. L. Casewell, G. A. Wynn and M. RoyA&A, 598 (2017) L6DOI: https://doi.org/10.1051/0004-6361/201630038
