Volume & Issue: Volume 4, Issue 3 - Serial Number 13, Summer 2019, Page 556-723 
2. A universal Banach space with a $K$-unconditional basis

Page 574-586

Taras Banakh; Joanna Garbulinska-Wegrzyn


8. Class of operators with superiorly closed numerical ranges

Page 673-687

Abderrahim Baghdad; Mohamed Chraibi Kaadoud