Jiang, Qinhui, and Changguo Shao. “A NEW CHARACTERIZATION OF \(L_2(p)\) WITH P ∈ {19, 23} BY NSE”. Italian Journal of Pure and Applied Mathematics, vol. 37, July 2017, pp. 624-30, https://journals.uniurb.it/index.php/ijpam/article/view/6770.