H. G. Koekkoek

Low-temperature ionic conductivity and dielectric relaxation phenomena in fluorite-type solid solutions

K. Wapenaar, H. G. Koekkoek, 1982 .

Damage production at the surface of Si single crystals by 200 keV He+ bombardment

L. Wiggers, H. Roosendaal, F. Saris, 1979 .