Published in Notulae Systematicae, in 1928, in volume 4, issue 4/5, pages 99-121

Published in Notulae Systematicae, in 1928, in volume 4, issue 4/5, pages 122-125

Published in Notulae Systematicae, in 1928, in volume 4, issue 4/5, pages 126-128

Published in Notulae Systematicae, in 1928, in volume 4, issue 4/5, pages 129-131

Published in Notulae Systematicae, in 1928, in volume 4, issue 4/5, pages 132-144

Published in Notulae Systematicae, in 1928, in volume 4, issue 4/5, pages 145-146