Bouma, Winn, McCullough, & Kosiarek, "Planet Detection Simulations for Several Possible TESS Extended Missions" (2017). A white paper submitted to arxiv.
Bouma & Winn, "Considerations for planning TESS extended missions" (2017). A snapshot of a document from the TESS team wiki. Intended to be a starting point for a broader collection of ideas, with input from scientists across all relevant areas of astrophysics.