On the single-chip implementation of a Hiperlan/2 and IEEE 802.11a capable modem. - Eckhard Grass; Klaus Tittelbach-Helmrich; Ulrich Jagdhold; Alfonso Troya; Gunther Lippert; Olaf Krüger; Jens Lehmann 002; Koushik Maharatna; Kai F. Dombrowski; Norbert Fiebig; Rolf Kraemer; Petri Mähönen (IEEE Wirel. Commun., 2001)

Change in cloud-top temperatures over Europe. - Abhay Devasthale; Olaf Krüger; Hartmut Grassl (IEEE Geosci. Remote. Sens. Lett., 2005)