Violina R. Angelova and  Venelina T. Popova and  Radka V. Ivanova and  Givko T. Ivanov and  Krasimir I. Ivanov,  Effect of Compost Application on Uptake and Allocation of Heavy Metals and Plant Nutrients and Quality of Oriental Tobacco Krumovgrad 90.   journal   = {International Journal of Agricultural and Biosystems Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2016, vol. 120(12). 772 - 779
    [viewed 23 January 2022]. Available from: https://publications.waset.org/pdf/10005838.