Vestfrid, I.A. (2001) “Isometric Imbedding of Some Metric Spaces in lp-Spaces”, Ukrains’kyi Matematychnyi Zhurnal, 53(12), pp. 1718–1723. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/4389 (Accessed: 10 April 2025).