Paeschke, Katrin, John Capra, and Virginia Zakian. (2011) 2011. “DNA Replication through G-Quadruplex Motifs Is Promoted by the Saccharomyces Cerevisiae Pif1 DNA Helicase.”. Cell 145 (5): 678-91. doi:10.1016/j.cell.2011.04.015. Reference Link