Ewing, John; Ewing, Maurice «Seismic-refraction measurements in the Atlantic Ocean basins, in the Mediterranean Sea, on the Mid-Atlantic Ridge, and in the Norwegian Sea». Geological Society of America Bulletin, 70, 3, 3-1959, pàg. 291–318. Bibcode: 1959GSAB...70..291E. DOI: 10.1130/0016-7606(1959)70[291:SMITAO]2.0.CO;2.
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Ewing, John; Ewing, Maurice «Seismic-refraction measurements in the Atlantic Ocean basins, in the Mediterranean Sea, on the Mid-Atlantic Ridge, and in the Norwegian Sea». Geological Society of America Bulletin, 70, 3, 3-1959, pàg. 291–318. Bibcode: 1959GSAB...70..291E. DOI: 10.1130/0016-7606(1959)70[291:SMITAO]2.0.CO;2.