If you want to register for SATTOSE 2019 and cannot find out how, you can register via this webpage of the collocated event (which is linked from the SATTOSE webpage) : http://seschool2019.inf.unibz.it/pages/registration.html

When registering you can then select that you are interested in either SATTOSE only, or in the collocated event as well (or only in the collocated event).

According to the website the Registration Deadline for online registration is July 4th 2019 AoE.