المؤلفون: Strathmann, Richard R., Hess, Helen C.

المصدر: American Zoologist, 1999 Apr 01. 39(2), 253-260.

URL الوصول: https://www.jstor.org/stable/3884248

المؤلفون: Hess, Helen C.

المصدر: The American Naturalist, 1993 Apr 01. 141(4), 577-596.

URL الوصول: https://www.jstor.org/stable/2462751

المؤلفون: Petersen, Christopher W., Warner, Robert R., Cohen, Sarah, Hess, Helen C., Sewell, Amy T.

المصدر: Ecology, 1992 Apr 01. 73(2), 391-401.

URL الوصول: https://www.jstor.org/stable/1940747

المؤلفون: Petersen, Christopher W., Hess, Helen C.

المصدر: Journal of Experimental Marine Biology and Ecology ; volume 151, issue 2, page 155-167 ; ISSN 0022-0981

الاتاحة: http://dx.doi.org/10.1016/0022-0981(91)90122-d
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