Liquefied Petroleum Gas Monitoring System Based on Polystyrene Coated Long Period Grating. - Flavio Esposito; Aldobenedetto Zotti; Giovanna Palumbo; Simona Zuppolini; Marco Consales; Antonello Cutolo; Anna Borriello; Stefania Campopiano; Mauro Zarrelli; Agostino Iadicicco (Sensors, 2018)