by Guthöhrlein, GH, Helmrich, G, Windholz, L
Published in Physical review. A, Atomic, molecular, and optical physics (01.01.1994)

by Helmrich, G A, Stallworth, J R, Brown, J J
Published in Southern medical journal (Birmingham, Ala.) (01.12.1990)

by Helmrich, G, Stubbs, T M, Stoerker, J
Published in American journal of obstetrics and gynecology (01.02.1992)

by Pak, William L., Helmrich, Hilary G.
Published in Vision research (Oxford) (01.05.1968)

by HELMRICH G, WUELFING F W O
Year of Publication 16.11.1976

by HELMRICH G, WUELFING F W O
Year of Publication 05.05.1975

by G. HELMRICH, J. GRANDERATH
Year of Publication 15.02.1973

by SCHROTER W, HELMRICH G, WOSNITZA M, WULFING F
Year of Publication 08.05.1976

by WULFING F,DT, HELMRICH G,DT
Year of Publication 16.07.1974

by SCHROETER W, HELMRICH G, WOSNITZA M, WUELFING F
Year of Publication 29.05.1974

by W. SCHROTER, M. WOSNITZA, G. HELMRICH, F. WULFING
Year of Publication 15.10.1973

by WULFING F,DT, HELMRICH G,DT
Year of Publication 03.07.1973