Leonardo da Vinci "Lady with an ermine" - the latest research into the artist's painting technique and the state of preservation of the painting - Czop, Janusz; Frączek, Piotr; Hoyo-Meléndez, Julio M. del; Matosz, Marta; Obarzanowski, Michał; Sobczyk, Joanna; Kozłowski, Roman; Krzemień, Leszek ca. 20./21. Jh; Łukomski, Michał; Węgrzynek, Dariusz; Wiącek, Piotr; Wróbel, Paweł; et al. (2015)