Hömmö, L., and S. Pulli. “Winterhardiness of Some Winter Wheat (Triticum aestivum), Rye (Secale cereale), Triticale (x Triticosecale) and Winter Barley (Hordeum Vulgare) Cultivars Tested at Six Locations in Finland”. Agricultural and Food Science, vol. 2, no. 4, July 1993, pp. 311-27, doi:10.23986/afsci.72654.