Scaling protection to the needs of metro optical networking. - Henning Hinderthür; Lars Friedrich (DRCN, 2005)

Design of an Analog-digital PI Controller with Gain Scheduling for Laser Tracker Systems. - Christian Wachten; Lars Friedrich; Claas Müller; Holger Reinecke; Christoph Ament (ICINCO-SPSMC, 2008)