Mihajlow, R. P., Atanasov, A., Ivanova, A., & Mihaylova, D. (2020). Study of the Vegetation of Spring Crops in the Region of South Dobrudja in 2020. ANNUAL JOURNAL OF TECHNICAL UNIVERSITY OF VARNA, BULGARIA, 4(2), 122–129. https://doi.org/10.29114/ajtuv.vol4.iss2.203