P. F.  Bruggemann and Calder, J. A., ?Botanical investigations in northeast Ellesemere Island, 1951?, Canadian Field Naturalist, vol. 67, pp. 157-174, 1953.

J. A.  Calder, ?Plants from the upper Frobisher Bay region, Baffin Island, N.W.T., Canada?, Canadian Field Naturalist, vol. 65, pp. 47-60, 1951.