The following publications are possibly variants of this publication:
- A hemisystem of a nonclassical generalised quadrangleJohn Bamberg, Frank De Clerck, Nicola Durante. dcc, 51(2):157-165, 2009. [doi]
- Hemisystems of small flock generalized quadranglesJohn Bamberg, Michael Giudici, Gordon F. Royle. dcc, 67(1):137-157, 2013. [doi]
- A New Infinite Family of Hemisystems of the Hermitian SurfaceJohn Bamberg, Melissa Lee, Koji Momihara, Qing Xiang. combinatorica, 38(1):43-66, 2018. [doi]