| The soils of Bulgaria T Shishkov, N Kolev Springer Netherlands, 2014 | 82 | 2014 |
| Soil atlas of Europe E Akça, S de Alba, AG Álvarez, S Bialousz, B Berger, P Bielek, W Blum, ... European Soil Bureau Network, 2005 | 20 | 2005 |
| The biogas market in Southern and Eastern Europe: Promoting biogas by non-technical activities D Rutz, R Janssen, C Epp, P Helm, M Grmek, G Agrinz, H Prassl, ... Proceedings of the 16th European Biomass Conference and Exhibition, 2501-2505, 2008 | 18 | 2008 |
| Some aspects of the present status of land degradation in Bulgaria S Rousseva, M Banov, N Kolev The JRC enlargement action, workshop, 149-164, 2003 | 12 | 2003 |
| Environmental Assessment of Soil for Monitoring, Volume IVa Prototype Evaluation E Micheli, S Bialousz, A Bispo, J Boixadera, AR Jones, MG Kibblewhite, ... Off. Off. Publ. Eur. Communities, Luxemb. 96pp, 2008 | 10 | 2008 |
| Heat treatment of kidney bean seeds. N Kolev | 6 | 1984 |
| Combined remote sensing and GIS technologies for land resources management in Bulgaria N Kolev, L Kozelov Bulgarian Journal of Agricultural Science 21 (4), 761-766, 2015 | 5 | 2015 |
| Remote Sensing and Synchronous Land Surface Measurements of Soil Moisture and Soil Temperature in the Field NV Kolev, KP Penev, YM Kirkova, BS Krustanov, TG Nazarsky, ... Turkish Journal of Physics 22 (1), 77-82, 1998 | 4 | 1998 |
| Energy budget elements estimation of the agricultural field by aircraft remote sensing and land surface observations N Kolev, A Levi, L Milenova, M Nenov, R Haarbrink, A Shutko Comptesrendusde l'Acade'miebulgare des Sci 65 (7), 991-996, 2012 | 3 | 2012 |
| Electrical probes of soil moisture and their applicability in irrigation control NV Kolev, K Pencv, Y Kirkova, B Krstanov, M Malicki Zeszyty Problemowe Postępów Nauk Rolniczych 346, 49-53, 1987 | 3 | 1987 |
| The dynamics of movement and accumulation of nutritive matter in the inflorescence and seed of leeks after cutting the seed-stalks. N Kolev, D Georgiev | 3 | 1964 |
| Technological framework for precise management of the system “soil-plants-ground atmosphere” M Banov, N Kolev, P Milenov Bulg. J. Agric. Sci 27 (3), 575-581, 2021 | 2 | 2021 |
| Rendzinas (Humus-Calcareous) Soils T Shishkov, N Kolev, T Shishkov, N Kolev The Soils of Bulgaria, 181-185, 2014 | 2 | 2014 |
| Saline soils T Shishkov, N Kolev, T Shishkov, N Kolev The soils of Bulgaria, 153-164, 2014 | 2 | 2014 |
| Management of Bulgarian soil resources fertility V Koutev, N Kolev 13th RAMARAN International Conference “Potential for Simple Technology …, 2008 | 2 | 2008 |
| Assessment of Histone H1^ o Levels in Glioblastoma multiforme N Kolev, M Georgieva, N Gabrovsky, K Uzunov, G Miloshev COMPTES RENDUS-ACADEMIE BULGARE DES SCIENCES 59 (1), 85, 2006 | 2 | 2006 |
| Computer System for Microclimate Management in Closed Areas of the Post-Minning Galleries and Greenhouses M Ilieva-Obretenova, N Kolev 2020 7th International Conference on Energy Efficiency and Agricultural …, 2020 | 1 | 2020 |
| Soils and humans T Shishkov, N Kolev, T Shishkov, N Kolev The Soils of Bulgaria, 199-203, 2014 | 1 | 2014 |
| Cinnamonic Forest Soils T Shishkov, N Kolev, T Shishkov, N Kolev The Soils of Bulgaria, 103-113, 2014 | 1 | 2014 |
| Zheltozem soils T Shishkov, N Kolev, T Shishkov, N Kolev The Soils of Bulgaria, 77-89, 2014 | 1 | 2014 |
