Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) J. F. Vald�s-Galicia and G. Wibberenz and J. J. Quenby and X. Moussas and G. Green and F. M. Neubauer,Pitch angle scattering of solar particles: Comparison of ?particle? and ?field? approach,Solar Physics,0038-0938,Springer Science and Business Media LLC,1988,117,1,135-156,https://cir.nii.ac.jp/crid/1361418520211542912,https://doi.org/10.1007/bf00148578