@incollection{Karaca13, author = {Sibel Karaca and Meliha Tan and √úner Tan}, title = {Humans Walking on all Four Extremities with Mental Retardation and Dysarthric or no Speech: A Dynamical Systems Perspective}, booktitle = {Developmental Disabilities}, publisher = {IntechOpen}, address = {Rijeka}, year = {2013}, editor = {Ahmad Salehi}, chapter = {4}, doi = {10.5772/55685}, url = {https://doi.org/10.5772/55685} }