Magnetic phase diagram of a spin S = 1∕2 antiferromagnetic two-leg ladder with modulated along legs Dzyaloshinskii-Moriya interactionNiko Avalishvili, Bachana Beradze and George I. JaparidzeEur. Phys. J. B, 92 12 (2019) 262DOI: https://doi.org/10.1140/epjb/e2019-100323-1