1. C. Barbu: Fundamental theorems of triangle geometry, Unique Publishing House, 2008, 505 pp., ISBN 978–973–88906–3-3.
2. C. Barbu: Isomorphism notion and applications, Grafit Publishing House, 2006, 143 pp., ISBN-10-973-7868-70-6.
3. C. Barbu: Complex Numbers, Grafit Publishing House, 2005, 233 pp., ISBN 973–7868-33–1.
4. C. Barbu, a.o.: Baccalaureate 2005-Admission to higher education, Valeriu Publishing House, Craiova, ISBN 973-8055-27-X.
5. C. Barbu, a.o.: Baccalaureate 2006-Admission to higher education, Valeriu Publishing House, Craiova, ISBN 973-8055-36-9.
6. C. Barbu, a.o.: Mathematics – Exercises and problems for fifth grade, Valeriu Publishing House, Craiova, 2004, ISBN 973-8055-11-3.
7. C. Barbu, a.o.: Mathematics – Exercises and problems for sixth grade, Valeriu Publishing House, Craiova, 2004, ISBN 973-8055-11-4.
8. C. Barbu, a.o.: Mathematics – Exercises and problems for fifth grade, Valeriu Publishing House, Craiova, 2005, ISBN 973-8055-23-7
9. C. Barbu, a.o.: Mathematics – Exercises and problems for sixth grade, Valeriu Publishing House, Craiova, 2005, ISBN 973-8055-24-5
10. C. Barbu, a.o.: Mathematics – Exercises and problems for seventh grade, Valeriu Publishing House, Craiova, 2005, ISBN 973-8055-25-3
11. C. Barbu, a.o.: Mathematics – Exercises and problems for eighth grade, Valeriu Publishing House, Craiova, 2005, ISBN 973-8055-26-1
12. C. Barbu, a.o.: Mathematics – Exercises for National Contest, Valeriu Publishing House, Craiova, 2005, Craiova, ISBN 973-8055-21-0
13. C. Barbu, a.o.: Mathematics – Baccalaureate 2009 MT1, Campion Publishing House, Galati, ISBN 978-606-92063-1-6.
14. C. Barbu, a.o.: Mathematics – Baccalaureate 2009 MT2, Campion Publishing House, Galati, ISBN 978-606-92063-1-7.
15. C. Barbu, a.o.: Methodological guide for baccalaureate 2009, Gil Publishing House, Zalau, ISBN 978-606-500-010-0
16. C. Barbu: Contribution to the Study of the Hyperbolic Geometry, Phd thesis, Cluj – Napoca, 2014.
17. C. Barbu, a.o.: Mathematics – Baccalaureate 2014 MT1, Campion Publishing House, Galati, 2014.
18. C. Barbu: Contributii la studiul geometriei hiperbolice, Cybernet, Bacau, 2014. ISBN 978-973-0-16826-6.
19. C. Barbu: Puncte, drepte si puncte remarcabile asociate unui triunghi, Cybernet, Bacau, 2017.
20. C. Barbu: Teoreme fundamentale din geometria triunghiului, Cybernet, Bacau, 2019. ISBN 978-973-88906-3-3.
21. C. Barbu: Triunghiuri remarcabile din geometria triunghiului, Cybernet, Bacau, 2019.
22. C. Barbu: Puncte, drepte si puncte remarcabile asociate unui triunghi (Editie revizuita si adaugita), Cybernet, Bacau, 2019. Ed. II-a. ISBN 978-973-0-23329-2.
Editor of
1. M. Mocanu, C. Berceanu and C. Barbu, National symposium of geometry “Gheorghe Ţiţeica”, Bacău, Romania, March 24-27, 2011, Bacău, Docucenter Publisher. 153~p. Zbl 1211.51001
2. M. Mocanu, C. Berceanu and C. Barbu, National symposium of geometry “Gheorghe Ţiţeica”, Bacău, Romania, April 4-7, 2012, Bacău, Docucenter Publisher