Orbital periods of cataclysmic variables identified by the SDSS - IX. NTT photometry of eight eclipsing and three magnetic systemsJ. Southworth, C. Tappert, B. T. Gänsicke and C. M. CopperwheatA&A, 573 (2015) A61DOI: https://doi.org/10.1051/0004-6361/201425060
