All Stories

  1. Voices from below

    Article • November 2025, Taylor & Francis

    Prof. Christina Lazarova Nikolova

  2. Internalizing External Accident Costs in Safety Investment Evaluation Using Cost–Benefit Analysis

    Article • Sustainability, October 2024, MDPI AG

    Prof. Christina Lazarova Nikolova

  3. Providing Sustainable Transport Infrastructure through Internalization of External Costs: A Case Study from South-Eastern European Countries

    Article • February 2024, IntechOpen

    Prof. Christina Lazarova Nikolova

  4. Internalization of External Environmental Costs of Transport as a Tool for Providing Sustainable Development

    Article • January 2024, Springer Science + Business Media

    Prof. Christina Lazarova Nikolova

  5. Improving Freight Exchange Business Models – Considerations and Recommendations

    Article • Yearbook of UNWE, November 2023, University of National and World Economy

    Prof. Christina Lazarova Nikolova

  6. A Social Sciences and Humanities research agenda for transport and mobility in Europe: key themes and 100 research questions

    Article • Transport Reviews, January 2023, Taylor & Francis

    Prof. Christina Lazarova Nikolova, Catarina Sales

  7. Providing Sustainable Transport Infrastructure through Internalization of External Costs: A Case Study from South-Eastern European Countries

    Article • SSRN Electronic Journal, January 2023, Elsevier

    Prof. Christina Lazarova Nikolova

  8. Impact Assessment of The Covid-19 Pandemic on Service Performance of Sofia Airport

    Article • European Journal of Sustainable Development, October 2022, European Center of Sustainable Development

    Prof. Christina Lazarova Nikolova

  9. Unified Approach for Assessing the Socio-Economic Efficiency of Investments in Transport Infrastructure Projects: a Methodological Framework

    Article • December 2021, ACM (Association for Computing Machinery)

    Prof. Christina Lazarova Nikolova

  10. Article • MEST Journal, July 2014, MESTE NGO

    Prof. Christina Lazarova Nikolova

  11. Sustainability implications of railway infrastructure charging and cost allocation: the case of Bulgaria

    Article • International Journal of Sustainable Economy, January 2010, Inderscience Publishers

    Prof. Christina Lazarova Nikolova

  12. User charges for the railway infrastructure in Bulgaria

    Article • Transportation Research Part A Policy and Practice, March 2008, Elsevier

    Prof. Christina Lazarova Nikolova