@article{article8126ffa5,
title   = {On the degree for oriented quasi-Fredholm maps: its uniqueness and its effective extension of the Leray–Schauder degree},
author = {Benevieri, Pierluigi and Calamai, Alessandro and Furi, Massimo},
year = {2015},
doi = {10.12775/TMNA.2015.052},
journal   = {Topological Methods in Nonlinear Analysis}
}