This might be a start: Miyake 2000 "The Unity and Diversity of Executive Functions and Their Contributions to Complex ``Frontal Lobe'' Tasks: A Latent Variable Analysis"
This might be a start: Miyake 2000 "The Unity and Diversity of Executive Functions and Their Contributions to Complex ``Frontal Lobe'' Tasks: A Latent Variable Analysis"
The reference given by Stevens will really be of great help to you. However, you may also find the following articles of some help (if you have not already gone through it)