We calculated differential cross sections for scattering of low-energy electrons by CH4 and SiH4 molecules. The calculations employed the Schwinger variational principle with plane waves as a trial basis set (J.L.S. Lino, M.A.P. Lima, Braz. J. Phys. 30, 432 (2000)). Our differential cross sections are found to be in good agreement with experimental data and theoretical results.
