http://www.hj-lohrisch.de/ 2012-01-26 monthly 1.00 http://www.hj-lohrisch.de/tribodiffusion.pdf 2012-02-17 daily 1.00 http://www.hj-lohrisch.de/tribosorption.pdf 2012-01-06 daily 1.00 http://www.hj-lohrisch.de/index.pdf 2012-01-06 weekly 0.80