PIHLSTRÖM, H. The cormorants of Lake Ladoga in the early 20th century: Arctic invaders or continental colonists?. Memoranda Societatis pro Fauna et Flora Fennica, [S. l.], v. 890, 2013. Disponível em: https://journal.fi/msff/article/view/40882. Acesso em: 20 huhti. 2024.