Two distinct genomic regions, harbouring the period and fruitless genes, affect male courtship song in Drosophila montana - Lagisz, M.; Wen, S. -Y.; Routtu, J.; Klappert, K.; Mazzi, D.; Morales-Hojas, R.; Schäfer, M.A.; Vieira, J.; Hoikkala, A.; Ritchie, M.G.; Butlin, R. K. (Heredity, 2012)