1. Ceccarelli, M., Ambrogi, M., Puglisi, L., Aquilini, M.: Ventilatory holter device, patent no. IT102021000008585, Italy, 7 April 2021
2. Alfverti, A., Cesareo, A.: A wearable device for the continuous monitoring of the respiratory rate, patent WO 2019/012384, Italy, 11 January 2019
3. Ciocchetti, M., et al.: Smart textile based on fiber Bragg grating sensors for respiratory monitoring: design and preliminary trials. Biosensors 5(3), 602–615 (2015)
4. Freeman J. F., et al.: Devices and methods for respiratory variation monitoring by measurement of respiratory volumes, motion and variability, patent WO2012021900A1, 16 February 2012
5. Gentili Biffi G.: Device for monitoring of respiration functions, patent IT1222263B, Italy, 21 June 1990