S.  Driggers and Kaeppler, S. R., ?Implementation of a point-to-point ray tracer?, HamSCI Workshop 2021. HamSCI, Scranton, PA (Virtual), 2021.

N. A.  Frissell, Moses, M. L., Earle, G., McGwier, R. W., Miller, E. S., Kaeppler, S. R., H. Silver, W., Ceglia, F., Pascoe, D., Sinanis, N., Smith, P., Williams, R., Shovkoplyas, A., and Gerrard, A. J., ?HamSCI: The Ham Radio Science Citizen Investigation?, in Fall 2016 American Geophysical Union, San Francisco, 2016.