Lieber, J., Butera, G., Hanson, M., Palmer, S., Horn, E., Czaja, C., Diamond, K., Goodman-Jansen, G., Daniels, J., Gupta, S., & Odom, S. (2009). Factors that influence the implementation of a new preschool curriculum: Implications for professional development. Early Education and Development, 20, 456-481.