Corless, R. M.; Gonnet, G. H.; Hare, D. E. G.; Jerey, D. J.; Knuth, D. E. (1996). "On the Lambert W Function"(PDF). Advances in Computational Mathematics. 5 (1): 329–359. doi:10.1007/BF02124750.
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Corless, R. M.; Gonnet, G. H.; Hare, D. E. G.; Jerey, D. J.; Knuth, D. E. (1996). "On the Lambert W Function"(PDF). Advances in Computational Mathematics. 5 (1): 329–359. doi:10.1007/BF02124750.