1. K.E. Tsiolkovsky, Speculations between Earth and Sky, Isd-vo AN-SSSR, Moscow, 1895, p. 35 (in Russian, reprinted in 1959).
2. Y. Artsutanov, To space by a locomotive, Komsomolskaya Pravda, 1960 (translated from Russian).
3. The orbital tower: a spacecraft launcher using the Earth's rotational energy;Pearson;Acta Astronautica,1975
4. Helical microtubules of graphitic carbon;Iijima;Nature,1991
5. Dynamics of a particle moving along an orbital tower;McInnes;Journal of Guidance, Control and Dynamics,2005