The Araucaria Project. The distance to the Sculptor group galaxy NGC 7793 from near-infrared photometry of Cepheid variables
Bartlomiej Zgirski, Wolfgang Gieren, Grzegorz Pietrzyński, Paulina Karczmarek, Marek Górski, Dariusz Graczyk, Bogumil Pilecki, Mónica Taormina, Ksenia Suchomska, Piotr Wielgórski and Piotr Konorski