Byrkjedal, I., Fjeldheim, V. B., Halvorsen, L. S. and Lislevand, T. (2022) “Diet of three sympatric species of granivorous songbirds in a Norwegian high mountain area during the early breeding season”, Ornis Norvegica, 45, pp. 16–26. doi: 10.15845/on.v45i0.3639.