The extended structure of the dwarf irregular galaxy SagittariusG. Beccari, M. Bellazzini, F. Fraternali, G. Battaglia, S. Perina, A. Sollima, T. A. Oosterloo, V. Testa and S. GalletiA&A, 570 (2014) A78DOI: https://doi.org/10.1051/0004-6361/201424411