Longo, William M, Yongsong Huang, Yuan Yao, Jiaju Zhao, Anne E Giblin, Xian Wang, Roland Zech, et al.. “Widespread Occurrence Of Distinct Alkenones From Group I Haptophytes In Freshwater Lakes: Implications For Paleotemperature And Paleoenvironmental Reconstructions”. Earth And Planetary Science Letters 492. Earth And Planetary Science Letters (2018): 239 - 250. doi:10.1016/j.epsl.2018.04.002.