by Skoog, A.I., Klein, K.E.
Published in Acta astronautica (01.01.1994)

by Klein, K.E., Hordinsky, J.R.
Published in Acta astronautica (01.09.1981)

by Wenzel, J., Klein, K.E., Vogt, L.
Published in Acta astronautica (1994)

by Klein, K.E.
Published in Acta astronautica (1981)

by Löllgen, H., Dirschedl, P., Koppenhagen, K., Klein, K.E.
Published in Acta astronautica (01.07.1992)

by Klein, K.E., Bluth, B.J., Wegmann, H.M.
Published in Acta astronautica (01.02.1988)