Grundel, Ralph; Pavlovic, Noel B.; Sulzman, Christina L (2000). "Nectar plant selection by the Karner blue butterfly (Lycaeides melissa samuelis) at the Indiana Dunes National Lakeshore". The American Midland Naturalist. 144 (1): 1–10. doi:10.1674/0003-0031(2000)144[0001:NPSBTK]2.0.CO;2. ISSN0003-0031. JSTOR3083005.
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jstor.org
Grundel, Ralph; Pavlovic, Noel B.; Sulzman, Christina L (2000). "Nectar plant selection by the Karner blue butterfly (Lycaeides melissa samuelis) at the Indiana Dunes National Lakeshore". The American Midland Naturalist. 144 (1): 1–10. doi:10.1674/0003-0031(2000)144[0001:NPSBTK]2.0.CO;2. ISSN0003-0031. JSTOR3083005.
Seiler, John; Jensen, Edward; Niemiera, Alex; Peterson, John (2011). "dewberry Rosaceae Rubus flagellaris Willd". Virginia Tech Department of Forest Resources and Environmental Conservation. Retrieved April 30, 2012.
Grundel, Ralph; Pavlovic, Noel B.; Sulzman, Christina L (2000). "Nectar plant selection by the Karner blue butterfly (Lycaeides melissa samuelis) at the Indiana Dunes National Lakeshore". The American Midland Naturalist. 144 (1): 1–10. doi:10.1674/0003-0031(2000)144[0001:NPSBTK]2.0.CO;2. ISSN0003-0031. JSTOR3083005.