@book{96158,
	author = {Cassirer, Ernst and Swabey, William Curtis},
	title = {Substance and function, and Einstein's theory of relativity},
	publisher = {The Open court publishing company},
	year = {1923.},
	address = {Chicago},
	note = {"The first part of the present book, Substanzbegriff und funktionsbegriff, was published in 1910, while the second part, which we have called the supplement, Zur Einstein'schen relativitätstheorie, appeared in 1921."}
}