L.  Engstrand and Gustafsson, M., ?Drawings of Scandinavian plants 81-82. Chenopodium L?, Bot. Notiser, vol. 125, pp. 283 - 286, 1972.

L.  Engstrand and Gustafsson, M., ?Drawings of Scandinavian plants: 86-88. Chenopodium L?, Bot. Notiser, vol. 126, no. 2, pp. 135 - 141, 1973.