API-related Developer Profiling. - Hakan Aksu; Ralf Lämmel (Softwaretechnik-Trends, 2015)

Visualization of API Experience. - Hakan Aksu; Ralf Lämmel; Wojciech Kwasnik (Softwaretechnik-Trends, 2016)

Developer Experience with the Django Web Framework. - Frederik Rüther; Hakan Aksu; Ralf Lämmel (Softwaretechnik-Trends, 2016)

Classification of APIs by hierarchical clustering. - Johannes Härtel; Hakan Aksu; Ralf Lämmel (ICPC, 2018)