Harrison, Timothy J. E.; Smith, Jennifer A.; Martin, Graham R.; Chamberlain, Dan E.; Bearhop, Stuart; Robb, Gillian N.; Reynolds, S. James (2010). "Does food supplementation really enhance productivity of breeding birds?". Oecologia. 164 (2): 311–320. Bibcode:2010Oecol.164..311H. doi:10.1007/s00442-010-1645-x. PMID20473622. S2CID23419420.
Orros, Melanie E.; Fellowes, Mark D.E. (2012). "Supplementary feeding of wild birds indirectly affects the local abundance of arthropod prey". Basic and Applied Ecology. 13 (3): 286–293. Bibcode:2012BApEc..13..286O. doi:10.1016/j.baae.2012.03.001.
Harrison, Timothy J. E.; Smith, Jennifer A.; Martin, Graham R.; Chamberlain, Dan E.; Bearhop, Stuart; Robb, Gillian N.; Reynolds, S. James (2010). "Does food supplementation really enhance productivity of breeding birds?". Oecologia. 164 (2): 311–320. Bibcode:2010Oecol.164..311H. doi:10.1007/s00442-010-1645-x. PMID20473622. S2CID23419420.
Orros, Melanie E.; Fellowes, Mark D.E. (2012). "Supplementary feeding of wild birds indirectly affects the local abundance of arthropod prey". Basic and Applied Ecology. 13 (3): 286–293. Bibcode:2012BApEc..13..286O. doi:10.1016/j.baae.2012.03.001.