1. Demian, T., Tudor, D., Curita, I., Nitu, C.: Fundamentals of precision engineering instruments design, vol. 1. Printed by Editor Tehnica, Bucharest, Romania (1984). (in Romanian)
2. Demian, T., Palade, D., Curita, I.: Elastic elements in precision engineering instruments. Printed by Editor Tehnica, Bucharest, Romania (1994). (in Romanian)
3. Rizescu, C.I.: Instruments and mechanisms for Precision engineering, Part I. Printed by Editor Printech, Bucharest, Romania (2013). (in Romanian)
4. Garanger, K., Khamvilai, T., Feron, E.: 3D printing of a leaf spring: a demonstration of closed-loop control in additive manufacturing. In: 2018 IEEE Conference on Control Technology and Applications, CCTA 2018, pp. 465–470 (2018)
5. Saleh, M.A., Ragab, A.E.: Ti-6Al-4V helical spring manufacturing via SLM: effect of geometry on shear modulus. In: Proceedings of the International MultiConference of Engineers and Computer Scientists, IMECS 2013, Hong Kong, 13–15 March 2013, vol. II (2013)