1. Aizpuru, A., Garcia-Pacheco, F.J.: Some questions about rotundity and renormings in Banach spaces. J. Aust. Math. Soc. 79(1), 131–140 (2005)
2. Anderson, K.W.: Midpoint local uniform convexity and other geometric properties of Banach spaces. Ph.D. Dissertation, University of Illinois, Urbana (1960)
3. Pitman Monographs and Surveys in Pure and Applied Mathematics;R Deville,1993
4. Fan, K., Glicksberg, I.: Some geometric properties of the spheres in a normed linear space. Duke Math. J. 25, 553–568 (1958)
5. Kar, S., Veeramani, P.: On $$k$$-uniformly rotund spaces and spaces with property $$k$$-UC. J. Nonlinear Convex Anal. 19(7), 1263–1273 (2018)