Borůvka, O.: Transformation of ordinary second-order linear diferential equations.
(English).
In:
Differential Equations and Their Applications.
Proceedings of the Conference held in Prague in September 1962.
Publishing House of the Czechoslovak Academy of Sciences, Prague, 1963.
pp. 27-38
Borůvka, O.:
Poznámka o vzorci Kummerově.
(Czech) [A remark on Kummer's formula].Časopis pro pěstování matematiky a fysiky,
vol. 54
(1925),
issue 2,
pp. 109-113