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RT Journal
T1 Geometrical-optics Method and Its Generalizations
A1 Kravtsov,Yu.A.
PB Physics-Uspekhi
PY 1970
FD 10 Feb, 1970
JF Physics-Uspekhi
JO Phys. Usp.
VO 13
IS 2
SP 297-298
DO 10.1070/PU1970v013n02ABEH004244
LK https://ufn.ru/en/articles/1970/2/o/
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