@book{5681,
	author = {Berestetskii, V.B. and Lifshitz, E.M. and Pitaevskii, L. P. },
	title = {Quantum electrodynamics : course of theoretical physics},
	publisher = {Elsevier},
	year = {2010,2020},
	address = {New Delhi},
	edition = {2nd ed.}
}