Maric, Filip, Margherita Paola Poto, Giuliana Panieri, and Olena Peftieva. “How deep is the ocean?”. Septentrio Educational, no. 3 (November 17, 2023): 72–75. Accessed July 17, 2024. https://septentrio.uit.no/index.php/SapEdu/article/view/7251.