Surface Cleaning and Modification by High Intense UV-Irradition for TiO2 Nanoparticle Films in Dye Sensitized Solar Cells
A. Kleine, U. Hilleringmann, Renewable Energy and Power Quality Journal (2017) 102–107.

Increasing the Efficiency of Solar Cells by Combining Silicon- and Dye Sensitized Devices
B. Ohms, A. Kleine, U. Hilleringmann, Renewable Energy and Power Quality (2017) 469–473.

Design and Implementation of a High Temperature Control Monitoring Applied to Micro Thermoelectric Generators
S.C.S. Jucá, P.C.M. Carvalho, R.I.S. Pereira, D. Petrov, U. Hilleringmann, Renewable Energy and Power Quality Journal (2013) 712–717.