@article{10_4153_CJM_2012_056_9,
     author = {He, Jianxun and Xiao, Jinsen},
     title = {Inversion of the {Radon} {Transform} on the {Free} {Nilpotent} {Lie} {Group} of {Step} {Two}},
     journal = {Canadian journal of mathematics},
     pages = {700--720},
     year = {2014},
     volume = {66},
     number = {3},
     doi = {10.4153/CJM-2012-056-9},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-2012-056-9/}
}