The origin of the supersoft X-ray-optical/UV flux anticorrelation in the symbiotic binary AG DraconisA. Skopal, M. Sekeráš, R. González-Riestra and R. F. ViottiA&A, 507 3 (2009) 1531-1539DOI: https://doi.org/10.1051/0004-6361/200811418