On some topological invariants for morphisms defined in homological spheres Nasreddine Mohamed Benkafadar | Boris Danielovich Gel'man | Show more Nasreddine Mohamed Benkafadar Algeria University of Constantine Department of Mathematics, Faculty of Sciences, Professor Boris Danielovich Gel'man Russian Federation Voronezh State University Department of Functional Theory and Geometry, Faculty of MathematicsProfessor Submitted: 2013-12-23 | Accepted: 2014-10-17 | Published: 2015-01-28 DOI: https://doi.org/10.4995/agt.2015.2057
