Excavations of the Kuyavian megalithic long barrow no. 2 of the funnel beaker culture, situated on site 1 at Gaj, commune of Izbica Kujawska, province of Kuyavia-Pomerania - Papiernik, Piotr ca. 20./21. Jh; Wicha, Joanna; Kacper Płaza, Dominik (2018)