I. J.  Bassett and Crompton, C. W., ?The biology of Canadian weeds, 2. Ambrosia artemisiifolia L. and A. psilostachya DC.?, Canad. J. Pl. Sci, vol. 55, pp. 463 - 476, 1975.

I. J.  Bassett and Crompton, C. W., ?The biology of Canadian weeds: 55. Ambrosia trifida L.?, Canad. J. Pl. Sci, vol. 62, no. 4, pp. 1003 - 1010, 1982.