Linear versus Non-linear Acquisition of Step-Functions - Boris Ettinger; Niv Sarig; Yosef Yomdin (CoRR, 2007)

Global Existence and Uniqueness of Weak Solutions of Three-Dimensional Euler Equations with Helical Symmetry in the Absence of Vorticity Stretching. - Boris Ettinger; Edriss S. Titi (SIAM J. Math. Anal., 2009)