1. Burgener J.A. (2015). 23.4°Massive elliptical comet impact craters on Earth .
2. Monika Kumlehn de Mamani & Ingrid Grambow (2018). IMPAKTNAMEN: Namen der [Meteorite; Impakte/Krater; Boliden/Fireballs; Tektite] im Sonnensystem.

Lake Erie and Lake Ontario bathymetric maps with 23.4° degree ellipses highlighted. Lake Ontario has a third ellipse of near horizontal orientation in the middle (Burgener J.A., 2015).

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