Each contribution, in order to be presented and subsequently published, requires registration for the conference by at least one of the authors.
In order to be registered, it is essential to proceed with the payment of the registration fee by at least one of the authors; in addition, in order to take advantage of the services provided during the conference (coffee breaks, light lunches, visits, etc.), the payment of the same fee is required of all authors who, in addition to the first one, should decide to be present during the days of the event.