He worked at Landau Institute for Theoretical Physics with Evgeny Lifshitz and contributed to the redaction of some chapters in Landau and Lifshitz"s course of theoretical physics for volume two. He got his Habilitation (Doctor of Sciences) degree at Landau Institute for Theoretical Physics in 1980. Currently he holds an equivalent professor position by special appointment at the Istituto Nazionale di Fisica Nucleare (Italy's National Institute of Nuclear Physics), University of Rome Louisiana Sapienza, Italy.
He held courses on general relativity at University of Rome.
He co-invented the Belinski-Zakharov transform in 1978 showing that black holes are a special example of gravitational solitons. One of his most notable contributions is BKL conjecture on the behavior of solutions of Einstein field equations near a singularity.
This conjecture received some support from numerical computations.