Time-resolved observations of the short period CV SDSS J123813.73-033933.0 S. V. Zharikov, G. H. Tovmassian, R. Napiwotzki, R. Michel and V. Neustroev A&A, 449 2 (2006) 645-653 Published online: 21 March 2006 DOI: 10.1051/0004-6361:20053597