@article {antunes2009cognitive, title = {A Cognitive Model for Frequency Signal Classification}, journal = {International Journal of Mathematical, Physical and Engineering Sciences}, volume = {3}, number = {4}, year = {2009}, note = {n/a}, pages = {240{\textendash}245}, publisher = {Citeseer}, abstract = {n/a}, author = {Antunes, R. and Coito, F. V.} }