@article{Savova_2019, title={Costs of Bulgarian Labour Migration and Labour Mobility: Challenges and Opportunities}, url={https://jfs.today/index.php/jfs/article/view/176}, DOI={10.24411/2500-0225-2019-10043}, number={4.2}, journal={Journal of Frontier Studies}, author={Savova, Ralitsa}, year={2019}, month={Dec.}, pages={410-430} }