J. F. Steffensen
Kopenhagen
TBD
mathscidoc:1701.33530
Leif Abrahamsson
Department of Mathematics, Uppsala University
TBD
mathscidoc:1701.332601
Juan Carlos Díaz
Matemáticas E. T. S. I. A. M., Universidad de Córdoba
Sean Dineen
University College Dublin, Beldfield, Dublin, Ireland
TBD
mathscidoc:1701.332885