“An Allegory in Grey and a Dutch Clue. A Painting Attributed to Franciszek Smuglewicz from the Collection of the National Museum in Warsaw”. Rocznik Muzeum Narodowego w Warszawie. Nowa Seria / Journal of the National Museum in Warsaw. New Series, no. 14(50) (February 27, 2026): 196–216. Accessed February 28, 2026. https://rocznik.mnw.art.pl/ojs/index.php/rm/article/view/204.