An improved PDS calculation procedure for hybrid systems. - Marcus Hellfeld; Jörg Krupar; Wolfgang M. Schwarz (ISCAS, 2006)

Ereignisgesteuerte kontinuierliche Systeme - Eigenschaften und Entwurfsprobleme (Discretely Controlled Continuous Systems - Properties and Design Problems). - Marcus Hellfeld; Axel Schild; Jan Lunze; Wolfgang M. Schwarz; Jörg Krupar (Autom., 2008)

A 17-tap 3.5 Gbps finite impulse response pulse shaping filter for 60 GHz transmitter with QPSK modulation. - Jinshu Zhao; Marcus Hellfeld; Thomas Wolf; Frank Ellinger; Le Ye (ESSCIRC, 2010)