Vitali systems of neighbouring type Leif Mejlbro — 1989 Acta Universitatis Carolinae. Mathematica et Physica
Generalized Vitali systems of uniform type Leif Mejlbro — 1987 Acta Universitatis Carolinae. Mathematica et Physica
A Precise Vitali Theorem for Lebesgue Measure. Leif Mejlbro; Flemming Topsoe — 1977 Mathematische Annalen
Vitali Systems in Rn with Irregular Sets. Leif Mejlbro; Flemming Topsoe — 1996 Mathematica Scandinavica
Some Vitali theorems for Lebesgue Measure. Leif Mejlbro; O. Jorsboe; F. Topsoe — 1981 Mathematica Scandinavica