Micro-force measurement with pre-curvature long-period fiber grating-based sensorWalter S. J. Ferreira, Paulo S. S. dos Santos, Paulo Caldas, Pedro A. S. Jorge and João M. S. SakamotoEPJ Web Conf., 238 (2020) 12009DOI: https://doi.org/10.1051/epjconf/202023812009