Verchovsky, A. B. (Open Univ. Milton Keynes, United Kingdom)
Russell, S. S. (Open Univ. Milton Keynes, United Kingdom)
Pillinger, C. T. (Open Univ. Milton Keynes, United Kingdom)
Fisenko, A. V. (Academy of Sciences USSR, Moscow., United States)
Shukolyukov, Yuri A. (Academy of Sciences USSR, Moscow., United States)