Grønstøl, G. B., and K-M. Pederson. “Neighbour Interference in Lapwing Vanellus Vanellus Nest Defence”. Ornis Fennica 74, no. 1 (March 31, 1997): 59–61. Accessed November 25, 2024. https://ornisfennica.journal.fi/article/view/133458.