%0 Journal Article %T Efficient Biased Estimation of Evolutionary Distances When Substitution Rates Vary Across Sites %A Guindon, Stéphane %A Gascuel, Olivier %J Molecular Biology and Evolution %V 19 %N 4 %P 534-543 %@ 0737-4038 %D 2002-04-01 %I Oxford University Press %~ DeepDyve