References

Knol, E., W. Prummel, H.T. Uytterschaut, M.L.P. Hoogland, W.A. Casparie, G.J. de Langen, E. Kramer & J. Schelvis 1996, The early medieval cemetery of Oosterbeintum (Friesland), Palaeohistoria 37/38, 245-416.