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van Hardenbroek, M.; Heiri, Oliver; Parmentier, F.J.W.; Bastviken, D.; Ilyashuk, B.P.; Wiklund, J.A.; Hall, R.I.; Lotter, A.F. (2013). Evidence for past variations in methane availability in a Siberian thermokarst lake based on δ13C of chitinous invertebrate remains. Quaternary Science Reviews, 66, pp. 74-84. Oxford: Pergamon 10.1016/j.quascirev.2012.04.009