Wyse, D.L., C.C. Sheaffer, N.J. Ehlke, D. R. Swanson, and D.J. Vellekson.  2003.  Registration of Everett Quackgrass.  Crop Sci 43: 433.

Ehlke, N.J., D.L. Wyse and D.J. Vellekson.  2003.  Registration of Roseau Birdsfoot Trefoil. Crop Sci. 43: 732-733.

DeHaan, L.R., N.J. Ehlke, C.C. Sheaffer, G.A. Meuhlbauer, and D.L. Wyse.  2003.  Illinois bundleflower genetic diversity determined by AFLP analysis.  Crop Sci. 43:402-408. 

DeHaan, L.R., N.J. Ehlke, C.C. Sheaffer, R.L. DeHaan, and D.L. Wyse.  2003.  Evaluation of diversity among and within accessions of Illinois bundleflower.  Crop Sci. 43: 1528-1537.

Moncada, K. M., N.J. Ehlke, G.J. Muehlbauer, C.C Sheaffer, D.L. Wyse, and L.R.DeHaan.  2007.  Genetic variation in three native plant species across the state of Minnesota.  Crop Sci. 47:  2379-2389.

Casler, M.D., K.P. Vogel, C.M. Taliaferro, N.J. Ehlke, J.D. Berdahl, E.C. Brummer, R.L. Kallenbach, C.P. West, and R.B. Mitchell.  2007.  Latitudinal and longitudinal adaptation of switchgrass populations.  Crop Sci. 47: 2249-2260.

Hulke, B.S., E. Watkins, D. Wyse, and N. Ehlke.  2007.  Winterhardiness and turf quality of accessions of perennial ryegrass (Lolium perenne L.) from public collections.   Crop Sci. 47: 1596-1602.

Hulke, B.S., E. Watkins, D. Wyse, and N. Ehlke.  2007. Freezing tolerance of selected perennial ryegrass (Lolium perenne L.) Accessions and its association with field winter hardiness traits.  Euphytica.  DOI 10.1007/s10681-007-9631-z.