Sándor Nagydobai Kiss,
On the cyclic quadrilaterals with the same Varignon parallelogram,
Forum Geometricorum, 18 (2018)
103--113.
The author and the editor regret an oversight that this paper has
significant overlap with the prior publication of
Michel Bataille,
Cyclic quadrilaterals with prescribed Varignon parallelogram,
Forum Geom., 7 (2007) 199--206.
The paper is hereby withdrawn.