A note on Willmore minimizing Klein bottles in Euclidean space
  We show that Lawson's bipolar surface $\tilde\tau_{3,1}$ is after stereographic projection the unique minimizer among immersed Klein bottles in its conformal class. We conjecture that it actually is the unique minimizer among immersed Klein bottles into $\mathbb{R}^n$, $n\geq 4$, whose existence the authors and P. Breuning proved in a previous paper. 
J. Hirsch, E. M\"ader-Baumdicker
math.DG math.AP