@inbook{coelho_silva_nespereira_abreu_rebordão_2015, 
  title={Writing of Long Period Fiber Gratings Using CO2 Laser Radiation}, 
  DOI={10.5772/59153}, 
  publisher={InTech}, 
  author={Coelho and Silva and Nespereira and Abreu and Rebordão}, 
  year={2015}, 
  month={Feb}
  }