Yan-Ping Wang Qiang Wang 0012 Wei-Guo Zhang Boomerang uniformity of normalized permutation polynomials of low degree. 307-322 2020 31 Appl. Algebra Eng. Commun. Comput. 3-4 https://doi.org/10.1007/s00200-020-00431-1 db/journals/aaecc/aaecc31.html#WangWZ20