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Article Kostro, Ludwik (1998)
Albert Einstein's hypothetism. Science and Education (pp. 317-322). (/isis/citation/CBB000077569/) unapi

Book Studies in the history of general relativity: Based on the proceedings of the 2nd International Conference on the History of General Relativity, Luminy, France, 1988 (1992). (/isis/citation/CBB000037350/) unapi

Book Kostro, Ludwik (1992)
Alberta Einsteina koncepcja eteru relatywistycznego: Jej historia, sens fizyczny i uwarunkowania filozoficzne. (/isis/citation/CBB000054299/) unapi

Article Kostro, Ludwik (1988 (pub. 1991))
Einstein's relativistic ether, its history, physical meaning and updated applications. Organon: International Review (pp. 219-235). (/isis/citation/CBB000059952/) unapi