[1] Ralf Köhl (né Gramlich) and Stefan Witzel.
The sphericity of the Phan geometries of type $B_n$ and $C_n$ and the Phan-type theorem of type $F_4$.
Trans. Amer. Math. Soc.365(2013)1577-1602.
Abstract, references, and article information View Article:PDF
[2] William M. Kantor and Michael E. Williams.
Symplectic semifield planes and ${\mathbb Z}_4$--linear codes.
Trans. Amer. Math. Soc.356(2004)895-938.
MR 1984461. Abstract, references, and article information View Article:PDF
