Remarks on algebraic concomitants of the Riemann-Christoffel curvature tensor in a three-dimensional space S. Topa — 1972 Annales Polonici Mathematici
Sur une généralisation des notions des vecteurs de Frenet et des courbures d’une courbe dans R n S. Topa — 1965 Annales Polonici Mathematici
Determination of differential concomitants of the first class of a pair of contravariant vectors in a two-dimensional space S. Topa — 1967 Annales Polonici Mathematici
Existence problem of the osculating planes of a curve in R n S. Topa — 1964 Annales Polonici Mathematici
On a generalization of the functional equation for the harmonic ratio of four points on a projective line over an arbitrary commutative field S. Topa — 1970 Annales Polonici Mathematici
Determination of differential concomitants of the first class of a pair of covariant vectors in a two-dimensional space S. Topa — 1967 Annales Polonici Mathematici