N.  Petit and Chi, P., ?SMART -- Expanding Array of Low Cost Magnetometers?, HamSCI Workshop 2022. HamSCI, Huntsville, AL, 2022.

N. J.  Petit and Chi, P., ?SMART Ground Based Magnetometer Array - an Initial Look?, HamSCI Workshop 2021. HamSCI, Scranton, PA (Virtual), 2021.