SIMBAD references

The history and the latest determinations of the lithium abundance in FG Sge and Sakurai's object (V4334 Sgr) are discussed. The present day abundances of Li in these stars are 3.8±0.2 dex and 3.6±0.3 dex, respectively (expressed as logε(Li) and normalized to logΣµ_iε_i=12.15). FG Sge is found to have nearly normal hydrogen abundance but Sakurai's object is hydrogen-deficient. The quoted Li abundance for Sakurai's object corresponds to the assumed C to He numerical abundance ratio of 10 %. The timing of the enrichment by Li is also discussed.