| Rural “green” tourism as a driver of local economy development in the process of decentralization of power A Yakymchuk, N Popadynets, A Valyukh, T Skrypko, K Levkov Agricultural and Resource Economics: International Scientific E-Journal 7 (1 …, 2021 | 20 | 2021 |
| The tourism regions in Bulgaria-situation and problems K Levkov, P Lakov Regional Economy and Sustainable Development, Conference Proceedings 2017 …, 2018 | 5 | 2018 |
| European Agricultural and Environmental Policy P Schwarcz, A Bandlerová, V Dimitrova, N Florią, Z Grigorova, L Hristov, ... Slovak University of Agriculture in Nitra: Nitra, Slovak Republic, 2016 | 5 | 2016 |
| Сільський «зелений» туризм як каталізатор розвитку місцевої економіки в процесі децентралізації влади A Yakymchuk, N Popadynets, A Valyukh, T Skrypko, K Levkov Agricultural and Resource Economics: International Scientific E-Journal, 232-259, 2021 | 4 | 2021 |
| Opportunities for sustanable development of the tourist exchange between Republic of Georgia and Republic of Bulgaria K Levkov, E Meskhia UARD Collective monograph series 1, 2018 | 4 | 2018 |
| Bulgaria's place in world tourism (an attempt to positioning) K Levkov New knowledge Journal of science 6 (1), 2017 | 4 | 2017 |
| Opportunities for increase of tourism flow from Russia to bulgaria by diversification of tourism product K Levkov VII Международная научная конференция "Инновации в технологиях и образовании …, 2014 | 4 | 2014 |
| Глобалните градове К Левков Сп. „География 21”,, 2010 | 3 | 2010 |
| FOREIGN TRADE OF BULGARIA IN THE PERIOD 2007–2017. QUANTITATIVE AND STRUCTURAL AMENDMENTS K Levkov Proceedings of the International scientific and practical conference …, 2019 | 2 | 2019 |
| DEMOGRAPHIC TRANSITION AND DEMOGRAPHIC PROBLEM IN BULGARIA K Levkov New knowledge Journal of science 6 (5), 95-110, 2017 | 2 | 2017 |
| Current problems of tourism zoning of Bulgaria K Levkov Proceedings of the IVth International Scientific Conference «Climate Change …, 2015 | 2 | 2015 |
| The Potential of the Late-Antique and Early Byzantine Fortress Storgosia as a Cultural and Historical Tourist Resource P Lakov, K Levkov, I Shopova Regional Economy and Sustainable Development, Conference Proceedings 2017 …, 2018 | 1 | 2018 |
| MORTALITY RATE AND LIFE EXPECTANCY IN BULGARIA IN THE PERIOD 2011–2021. DYNAMICS AND TERRITORIAL DIFFERENCES K Levkov UARD Collective monograph series 5, 2022 | | 2022 |
| THE OLD AND THE NEW GLOBAL CITIES-REORDERING K Levkov UARD Yearbook 8, 209-248, 2020 | | 2020 |
| Results Of A Questionnaire On Senior Тourism In Bulgaria K Levkov Cataloging-In-Publication Data, 60, 2019 | | 2019 |
| Приносът на Жечо Чанков към Българското географско дружество и българската география К Левков Известия на Българското географско дружество, 106-111, 2019 | | 2019 |
| Tourist infrastructure K Levkov, I Shopova UARD Collective monograph series 2, 2019 | | 2019 |
| TOURIST EXPORT OF BULGARIA AS A FACTOR FOR REDICING THE NEGATIVE FOREIGN TRADE BALANCE K Levkov, P Lakov, V Velikov Proceedings of the International scientific and practical conference …, 2019 | | 2019 |
| The position of the capital cities and urban agglomerations in the system of classification of territorial units for statistics K Levkov, P Lakov Proceedings of the International scientific and practical conference …, 2018 | | 2018 |
| On the need for a thorough reform of the administrative territorial structure of Bulgaria K Levkov, V Velikov Proceedings of the International scientific and practical conference …, 2018 | | 2018 |
