Sommaire

Contents
Parameter estimation in cosine regression
p. 3-17
Effects of the axial component of the space charge electric field in the omegatron
p. 19-39
Medial division groupoids
p. 41-60
Quasigroups whose regular mappings are automorphisms
p. 61-71
Observations of comets and asteroids at the Kleť Observatory in the year 1977
p. 73-82