| Hotelul - Economie si management N Lupu BIC ALL srl, 1998 | 90 | 1998 |
| Lexicon de termeni turistici G Stănciulescu, N Lupu, G Țigu, E Țițan, F Stăncioiu Editura Oscar Print, București, 2002 | 30* | 2002 |
| Dicţionar poliglot explicativ de termeni utilizaţi în turism G Stănciulescu, G Ţigu, N Lupu All Educaţional, 1998 | 26 | 1998 |
| The Hotel - Economy and management, the 4th edition N Lupu All Beck Publishing House, Bucharest, 2003 | 24* | 2003 |
| Hotelul–Economie si Management”, Editia a Va, Ed N Lupu All Beck, Bucuresti, 2005 | 21* | 2005 |
| A straightforward x-ray on applying The Ecolabel to the hotel business area N Lupu, MO Tanase, RA Tontoroiu Amfiteatru Economic Journal 15 (Special No. 7), 634-644, 2013 | 20 | 2013 |
| Perception about business education in the tourism domain and the hospitality industry N Lupu, MO Tanase, AM Nica Amfiteatru Economic Journal 16 (37), 800-810, 2014 | 12 | 2014 |
| Strategia de concentrare a întreprinderilor de turism N Lupu Editura Economică, 2003 | 11* | 2003 |
| The Hotel, Economy and management N Lupu Bucharest: AllBeck, 2002 | 11* | 2002 |
| Destination Management Organization’S (Dmo’S) Roles, Structures and Performance - Comparative Analysis AL Negrusa, N Lupu, MM Coros, CM Moca Proceedings of the 11th International Management Conference “The Role of …, 2017 | 9 | 2017 |
| The Avatars of Hotels Classification Systems N Lupu, AM Nica Revista de turism-studii si cercetari in turism, 5-12, 2010 | 9* | 2010 |
| Dicționar poliglot explicativ de termeni utilizați în turism G Stănciulescu, N Lupu, G Țigu București, Editura ALL, 1998 | 9 | 1998 |
| Quo Vadis „Living Human Treasures”? N Lupu, MO Tănase, P Tudorache Amfiteatru Economic Journal 18 (Special Issue No. 10), 757-766, 2016 | 8 | 2016 |
| Hotel - Economics and Management N Lupu 6th Edition. CH Beck Publishing. Bucharest. Romania, 2010 | 7* | 2010 |
| Gestiune hotelieră şi de restaurant - Sinteze, teste grilă şi cazuri practice N Lupu Editura ASE, Bucuresti, 2005 | 6* | 2005 |
| Skills for tourist services A Marin-Pantelescu, N Lupu Journal of Applied Economic Sciences 4 (2), 8, 2009 | 3 | 2009 |
| Manners of cooperation between agencies from the international tourism for improving the tourism activities N Lupu, A Marin-Pantelescu Amfiteatru Economic 10, 146-153, 2008 | 3 | 2008 |
| Strategia de neangajare financiară a marilor lanţuri hoteliere N Lupu, G Țigu Revista de turism-studii si cercetari in turism, 21-23, 2006 | 3 | 2006 |
| Online Reviews: Measuring the Quality of Services on the 5* Hotel Market in Bucharest MO TĂNASE, L Nicolae, C Maria Romania 16, 17, 2018 | 2 | 2018 |
| Sustainable Tourism, between social Responsibility and non-financial Reporting N Lupu Amfiteatru Economic Journal 18 (Special Issue No. 10), 737-739, 2016 | 2 | 2016 |
