[2], Further disintegration of Scrophulariaceae. Bengt Oxelman, Per Kornhall, Richard G. Olmstead & Birgitta Bremer
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[1], Disintegration of the Scrophulariaceae. Richard G. Olmstead, Claude W. dePamphilis, Andrea D. Wolfe, Nelson D. Young, Wayne J. Elisons and Patrick A. Reeves.
[3], Piecing together the "new" Plantaginaceae. D. C. Albach, H. M. Meudt and B. Oxelman