Mathematics

QUINE, WILLARD ORMAN VAN.

Cambridge, Massachusetts, Harvard University Press, 1934.

SPECHT, WILHELM.

Berlin, Göttingen, heidelberg, 1956.

(BONNEZ ?).

Uden sted og år, ca. 1850.

NEWANLINNA, ROLF.

Berlin, Göttingen, Heidelberg, Springer Verlag, 1953.

CECH, EDUARD.

N.Y., London, Prag, Academic Press, 1969.

LEVENS, A.S.

N.Y., Ldn., 1948.