Polyachenko V.L.,  Fridman A.M. Ravnovesie i ustoychivost gravitiruyushchikh sistem./Polyachenko V.L.,  Friedman A.M. Equilibrium and stability of gravity systems. In Russian - landofmagazines.com

TransliterationPolyachenko V.L., Fridman A.M. Ravnovesie i ustoychivost gravitiruyushchikh sistem.

In EnglishPolyachenko V.L., Friedman A.M. Equilibrium and stability of gravity systems. In Russian

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