Švec, Alois:
On minimal surfaces in $E^5$.
(English).Commentationes Mathematicae Universitatis Carolinae,
vol. 16
(1975),
issue 2,
pp. 353-357
Švec, Alois:
On orthogonal conjugate nets in $E^4$.
(English).Commentationes Mathematicae Universitatis Carolinae,
vol. 16
(1975),
issue 1,
pp. 183-187