1. Burgener J.A. (2015). 23.4Massive elliptical comet impact craters on Earth .
  2. Monika Kumlehn de Mamani & Ingrid Grambow IMPAKTNAMEN: Namen der [Meteorite; Impakte/Krater; Boliden/Fireballs; Tektite] im Sonnensystem.(2019)


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).