Smith, Zachary D, Michelle M Chan, Tarjei S Mikkelsen, Hongcang Gu, Andreas Gnirke, Aviv Regev, and Alexander Meissner. (2012) 2012. “A Unique Regulatory Phase of DNA Methylation in the Early Mammalian Embryo.”. Nature 484 (7394): 339-44. doi:10.1038/nature10960.