1. MCNPX 2.7.0 — Monte Carlo N-Particle Transport Code System for Multiparticle and High Energy Applications, https://mcnpx.lanl.gov/.
2. Tables of Integral Transforms, Vol. 1, McGraw-Hill, 1954, sect. 5.2, pages 230, eq. 9, https://authors.library.caltech.edu/43489/1/Volume%201.pdf.
3. http://www.hsl.rl.ac.uk/.
4. W.L. Wilson et al., Proc. SARE4 Workshop, Knoxville, USA, 1998.