Blomqvist, A.G. & Söderberg, C. & Lundell, I. & Milner, R.J. & Larhammar, D. (1992)
Strong evolutionary conservation of neuropeptide Y (NPY); sequences of chicken, goldfish, and Torpedo marmorata DNA clones. Proceedings of the National Academy of Sciences of the United States of America, 89(6), 2350–2354