Lewis, B. A., Avrich, A. A., Freebairn, L. A., Taylor, H. G., Iyengar, S. K., & Stein, C. M. (2011). Subtyping Children With Speech Sound Disorders by Endophenotypes.

Lewis, Barbara A., Allison A. Avrich, Lisa A. Freebairn, H. Gerry Taylor, Sudha K. Iyengar, ja Catherine M. Stein. Subtyping Children With Speech Sound Disorders By Endophenotypes. 2011.

Lewis, Barbara A., et al. Subtyping Children With Speech Sound Disorders By Endophenotypes. 2011.