As a Ph.D. student at KTH, you need to achieve a certain amount of credits by taking courses becides your research work. The coursework includes 60-90 credits for Degree of Doctor and 40-60 credits for Degree of Licentiate, according to the general syllabus for third-cycle subject in computer science.
More information about finding courses, transfering course credits, and school policy on summer course credits could be found here: [KTH Intranet
- Course information for doctoral students](https://intra.kth.se/en/eecs/forskarutbildning/courses/course-information-for-doctoral-students-1.813447) (kth account needed)