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@article{MS2_1984__54_166895, author = {Arne Jensen}, title = {On {Lavine's} formula for time-delay.}, journal = {Mathematica Scandinavica}, pages = {253--261}, publisher = {mathdoc}, volume = {54}, year = {1984}, zbl = {0529.46006}, url = {http://geodesic.mathdoc.fr/item/MS2_1984__54_166895/} }
Arne Jensen. On Lavine's formula for time-delay.. Mathematica Scandinavica, Tome 54 (1984), pp. 253-261. http://geodesic.mathdoc.fr/item/MS2_1984__54_166895/