| Fenomene geografice de risc S Ciulache, N Ionac Editura Universităţii Bucureşti, 1995 | 80* | 1995 |
| Atlasul bioclimatic al României N Ionac, S Ciulache Ars Docendi, 2008 | 31 | 2008 |
| Mic tratat de geografie medicală N IIonac Editura Universităţii din Bucureşti, Bucureşti, 2000 | 15* | 2000 |
| Climatologie comportamentală S Ciulache, N Ionac Universitatea, 1998 | 13 | 1998 |
| The bioclimatic stress in Dobrudja N Ionac, S Ciulache Present Environ. Sustain. Dev 1, 168-178, 2007 | 12 | 2007 |
| Dicţionar de meteorologie şi climatologie S Ciulache, N Ionac Ars Docendi, 2003 | 12 | 2003 |
| Esenţial în meteorologie şi climatologie S Ciulache, N Ionac Editura Universitară, 2007 | 10 | 2007 |
| Ghid de cercetare environmentală N Ionac Ars Docendi, 2005 | 9 | 2005 |
| Clima și comportamentul uman N Ionac Editura Enciclopedică, 1998 | 9* | 1998 |
| Main Bioclimatic Characteristics of the Romanian Shore on the Black Sea I Nicoleta Analele Universităţii Bucureşti, Seria Geografie, 5-16, 2007 | 8 | 2007 |
| The bioclimatic stress due to overcooling in the southern Dobrudjan tableland area N Ionac, E Grigore Present Environment and Sustainable Development, 235-246, 2012 | 7* | 2012 |
| Évaluation des phénomènes de dessèchement et de sécheresse dans la zone continentale du plateau de la Dobroudja du Sud N Ionac, E Grigore, D Constantin XXVIIIe Colloque de l’Association Internationale de Climatologie, 269-274, 2015 | 6 | 2015 |
| Fenomene atmosferice de risc şi catastrofe climatice, Edit S Ciulache, I Nicoleta Ştiinţifică, Bucureşti, 1995 | 6 | 1995 |
| General evolution trends of air temperature in Romania S Ciulache, N Ionac Analele Universitatii din Bucharest, seria Geografie 42, 61-67, 1993 | 6 | 1993 |
| The influences of land use on the urban heat island in Bucharest B Uriţescu, N Ionac, G Grigoraş Iternational Conference Air and Water Components of the Environment, 17-19, 2017 | 5 | 2017 |
| The bioclimatic comfort of an it office and its occupants’ perception about their working environment N Ionac, AC Mihoc, P Tăbleţ Present Environment and Sustainable Development, 81-92, 2012 | 5 | 2012 |
| Stressul bioclimatic în Dobrogea, vol N Ionac Lucrările Seminarului Geografic “Dimitrie Cantemir, 2007 | 5 | 2007 |
| The Heat stress in Moldavian Counties N Ionac Proceedings of the Geographic Seminar “D. Cantemir”, Bucharest, Romania, 28-29, 2005 | 5 | 2005 |
| Main Types of Climate in Romania S Ciulache, I Nicoleta Analele Universităţii din Bucureşti, seria Geografie 53, 15-23, 2004 | 5 | 2004 |
| Topoclimatic and microclimatic diferences in the Piteşti Town-Area S Ciulache, N Ionac Present Environ. Sustain. Environ 2, 117-124, 2008 | 4 | 2008 |
