@book{98285,
	author = {Berestetskii, V.B. and Sykes, J.B. and Bell, J.S. Tr. and Pitaevskii, L.P.},
	title = {Quantum Electrodynamics.vol.4},
	publisher = {Elsevier},
	year = {2005},
	series = {Course of Theoretical Physics},
	address = {New Delhi},
	edition = {2nd ed.}
}