If you publish work that uses HullRad or HullRadSAS please cite the approriate reference.

For the original HullRad:
Fleming, P.J. and Fleming, K.G.
"HullRad: Fast Calculations of Folded and Disordered Protein and Nucleic Acid Hydrodynamic Properties"
Biophysical Journal, 114:856-869, February 27, 2018
DOI: 10.1016/j.bpj.2018.01.002

The original HullRad was updated to calculate non-ideality properties ks, kd, and second virial coefficient and is described in the following:
Fleming, P.J., Corriea, J.J. and Fleming, K.G.
"The Molecular Basis for Hydrodynamic Properties of PEGylated Human Serum Albumin"
Biophysical Journal, Online June 21, 2024
DOI: 10.1016/j.bpj.2024.05.019

For HullRadSAS:
Fleming, P.J., Corriea, J.J. and Fleming, K.G.
"Revisiting Macromolecular Hydration with HullRadSAS"
(2023) Eur. Biophys. J. Online Jan 5.
DOI: 10.1007/s00249-022-01627-8
Abstract
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Note: The EBJ paper also describes updates to the original HullRad incorporated in HullRadV9.