$f_1$ Vector Meson Dominance Model for the Strange Axial Form Factor of   the Nucleon
  The axial strange form factor $F^s_A$ of the nucleon is assumed to be dominated at low momentum transfer by the isoscalar axial vector mesons $f_1(1285)$ and $f_1(1420)$. The importance of the $a_0\pi N$-triangular vertex correction is demonstrated. 
M. Kirchbach and H. Arenhoevel