Characterization of organic matter in bottom sediments of Ivashkina Lagoon, Laptev SeaElena Gershelis, Ivan Goncharov, Oleg Dudarev, Alexey Ruban and Igor SemiletovE3S Web Conf., 98 (2019) 06006DOI: https://doi.org/10.1051/e3sconf/20199806006