Nesterowicz, K., Radicev, S., Fereshtehnejad, S.-M., Peacock, J. and Nemeslaki, A. 2019. PhD Education Challenges - Doctoral Candidates’ Perspectives. European Scientific Journal, ESJ. 15, 4 (Feb. 2019), 54. DOI:https://doi.org/10.19044/esj.2019.v15n4p54.