Silmlased
Bergstedt, Gavin C. Christie, Phillip A. Cochran, Mark P.
Ebener, Joseph F. Koonce, Michael A. Rutter, William D. Swink. 2003. Journal of Great
Lakes Research. Volume 29, Supplement 1, 2003, Pages 253-282.
http://www.sciencedirect.com/science/article/pii/S0380133003704936 (viimati vaadatud
19.03.2012)
[4] Weiming Li, Michael Twohey, Michael Jones, Michael Wagner. 2007. Journal of Great
Lakes Research, Volume 33, Supplement 2. Pages 70-86
http://www.sciencedirect.com/science/article/pii/S0380133007701272 (viimati vaadatud
18.03.2012)
[5] John W. Heinrich, Katherine M. Mullett, Michael J. Hansen, Jean V. Adams, Gerald T.
Klar, David A. Johnson, Gavin C. Christie, Robert J. Young. 2003. Journal of Great Lakes
Research, Volume 29, Supplement 1.Pages 566-583.
http://www.sciencedirect.com/science/article/pii/S0380133003705176 (viimati vaadatud
21.03.2012)
[6] Roger A. Bergstedt, Rodney B. McDonald, Katherine M. Mullett, Gregory M. Wright,
William D. Swink, Kenneth P. Burnham. 2003