Prof. Dr. Silvia von Steinsdorff, Felix Petersen, Dr. Zeynep Yanasmayan and Maria Haimerl have written a 3-part series on the constitutional reform in Turkey on Verfassungsblog. Fascinating read!
Steinsdorff, Silvia von (2017): Presidentialism á la Turca or what? The (missing) logic behind the constitutional amendments, VerfBlog, 2017/2/13.
Petersen, Felix/Yanasmayan, Zeynep (2017): The Final Trick? Separation of Powers, Checks and Balances, and the Recomposition of the Turkish state, VerfBlog, 2017/1/28.
Haimerl, Maria (2017): The Turkish Constiutional Court under the Amended Constitution, VerfBlog, 2017/1/27.