@article{01751239, title = {Some examples of nontrivial homotopy groups of modules.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {25}, year = {2001}, pages = {189-195}, doi = {10.1155/S0161171201005373}, zbl = {1018.18009}, language = {en}, url = {http://dml.mathdoc.fr/item/01751239} }
Su, C.Joanna. Some examples of nontrivial homotopy groups of modules.. International Journal of Mathematics and Mathematical Sciences, Tome 25 (2001) pp. 189-195. doi : 10.1155/S0161171201005373. http://gdmltest.u-ga.fr/item/01751239/