Ma L, Weeda G, Jochemsen AG, Bootsma D, Hoeijmakers JH, van der Eb AJ. Molecular and functional analysis of the XPBC/ERCC-3 promoter: transcription activity is dependent on the integrity of an Sp1-binding site. Nucleic Acids Res. 1992 Jan 25;20(2):217–24. PMID: 1741247; PMCID: PMC310357.