Mathematics

CAYLEY, ARTHUR. - THE FOUR COLOUR THEOREM.

London, Edward Stanford, 1879.

LANDRÉ, CORNEILLE L.

Jena, G. Fischer, 1901.

VOLTERRA, VITO.

[Berlin, Stockholm, Paris, F. & G. Beijer, 1912].

BERNSTEIN, S. N.

Berlin, Stockholm, Paris, Beijer, 1914.

BOIS-REYMOND, PAUL DAVID GUSTAV DU.

Leipzig, B. G. Teubner, 1875.

EXNER, ROBERT M. & MYRON F. ROSSKOPF.

New York & Toronto & London, McGraw-Hill, 1959.

BOERNER, HERMANN.

Berlin, Springer, 1955.

MERRIMAN, MANSFIELD.

London, Macmillan and Co., 1877.

SALKOWSKI, E.

Leipzig, 1928.

BOREL, ÉMILE.

Paris, Felix Alcan, 1928.

BENDIXON, IVAR.

(Berlin, Stockholm, Paris, Almqvist & Wiksell, 1901).

VOLTERRA, VITO.

Berlin, Stockholm, Paris, Beijer, 1899.

EULER, LEONHARD - THE PRINCIPLE OF LEAST ACTION

(Berlin, Haude et Spener, 1753).

HENDERSON, F.M.

Michigan, University of Michigan Press, 1960.

BEAUSOBRE, LOUIS de.

Paris, Durand, Pissot, 1753.

BRIOT, CHARLES AUGUSTE. & BOUQUET, JEAN-CLAUDE.

Paris, Mallet-Bachelier, 1859.

DWYER, PAUL S.

N.Y., Wiley & Sons, (1951).

DEBYE, P. [PETER JOSEPH WILLIAM DEBYE].

Leipzig, B.G. Teubner, 1909.