Citations: Anonym 1984: [Oostroom, S. I. van] Symphytos, Ottawa/Washington 2, B15 B2245:4, pp. 14
Huijbregts, H. 1999: [Ooststroom, S. J. van] Everts, Info, Suppl. 43 (48), Sep. DEI, pp. ?
Maas Geesteranus, R. A. 1971: [Ooststroom, S. J. van] Gorteria 5, pp. 97-101
Prud'homme van Reine, W. F. 1983: [Ooststroom, S. J. van] Natura, Amsterdam 80, pp. 117
Vogelenzang, L. 1971: [Ooststroom, S. J. van] Gorteria 5, pp. 101-115