For example on 6 June 1957 Sobolev gave the lecture On the works of A M Lyapunov on potential theory in Moscow to a joint session of the Presidium of the Academy of Sciences, the divisions of technical and physical sciences of the Academy of Sciences, the Moscow University, the Moscow Mathematical Society, the Institute of Mechanics of the Academy of Sciences, and the Institute of Automatics and Telemechanics of the Academy of Sciences.
Halimbawa sa 6 ng Hunyo 1957 Sobolev ibinigay ng panayam sa mga gawa ng AM Lyapunov sa mga potensyal na teorya sa Moscow sa isang pinagsamang sesyon ng presidyum ng Academy of Sciences, ang Divisions ng teknikal at pisikal na siyensiya ng Academy of Sciences, ang Moscow University, Ang Moscow matematiko Society, ang Institusyon ng mekanika ng Academy of Sciences, at ang Institute ng Automatics at telemekanika ng Academy of Sciences.