Dinh, N.
Goberna, M. A.
Volle, M.
Article History
First Online: 25 July 2019
Change Date: 17 December 2019
Change Type: Correction
Change Details: The authors would like to correct the errors caused by a wrong equation (A=B+z), at the end of the proof of Lemma 2.1 in the original article, which affects this lemma, two subsequent examples, as well as other statements spread along the paper.