Kosztyuné Krajnyák, Edit, et al. “Investigation of Harvest Index Influencing Agrotechnical and Botanical Factors in Hairy Vetch (Vicia Villosa Roth.)”. Acta Agraria Debreceniensis, no. 1, June 2021, pp. 123-8, https://doi.org/10.34101/ACTAAGRAR/1/3764.