@article{paperid:1036659, author = {M. Karimi Amaleh and Afsharnejad, Zahra}, title = {Periodic Solutions in Certain Class of 3-Dimension Discontinuous Autonomous Systems}, journal = {Journal of Mahani Mathematical Research Center}, year = {2012}, volume = {1}, number = {2}, month = {January}, issn = {2251-7952}, pages = {119--136}, numpages = {17}, keywords = {perturbation periodic solution discontinuous system}, }