1. 2.1628 2.1556 2.1542 2.1535 2.1532
2. Control of Non-Rigid Spacecraft, Frascati, F Italy, May 1976, pp. 349-354.
3. Two Satellites Connected by a Deployable and Extensible Tether of Finite Mass", Contract Report, ESTEC Contract No. 2992/76/NL/AK(SC), Vols. 1 and 2, October 1978. Mode I 2 3 4 5