Jacobians in isogeny classes of supersingular abelian threefolds in   characteristic 2
  We exhibit the isogeny classes of supersingular abelian threefolds over F_{2^n} containing the Jacobian of a genus 3 curve. In particular, we prove that for even n>6 there always exist a maximal and a minimal curve over F_{2^n}. All the curves can be obtained explicitly. 
Enric Nart, Christophe Ritzenthaler