1. Nikolova-Alexieva V.,(2019)“State of the Bulgarian Bioeconomy and Opportunities for its Development”, Monograph, Intelekspert-94 Publishing House, pp.46
2. Hadzhiev B., Nikolova-Alexieva V.,(2020)“The role of process innovation in boi-based production”, Monograph, Intelekspert-94 Publishing House, pp. 112
3. Ackah, D., M. R. Agboyi, (2014),Strategic Management: Management Strategy, CreateSpace Independent Publishing Platform;
4. Nikolova-Alexieva V., Valeva K.,(2019)“Enhancing the competitiveness of bio-sector enterprises for stronger bio-economy”, KNOWLEDGE–International Journal, Vol.35.1, ISSN 2545-4439, Institute of Knowledge management, December, Bansko, Bulgaria, pp. 381–387
5. Blewitt, J., (2014), Understanding Sustainable Development, Routledge