@article{01627577, title = {Homotopy classes that are trivial mod }, journal = {Geometry \& Topology}, volume = {5}, year = {2001}, pages = {381-409}, doi = {10.2140/agt.2001.1.381}, zbl = {0982.55009}, language = {en}, url = {http://dml.mathdoc.fr/item/01627577} }
Arkowitz, Martin; Strom, Jeffrey. Homotopy classes that are trivial mod . Geometry & Topology, Tome 5 (2001) pp. 381-409. doi : 10.2140/agt.2001.1.381. http://gdmltest.u-ga.fr/item/01627577/