J.G. Bannenberg: MEQALAC, the other RF acceleratorIn: Topical Problems of Accelerator and Applied Heavy Ion Physics : Aktuelle Probleme der Beschleuniger- und Angewandten Schwerionenphysik, GSI-90-29 Report, Gesellschaft für Schwerionenforschung, 1990. - pp. 10-12
E. van der Heijden, J.J. Boon and M.A. Scheijen: Pyrolysis mass spectrometric mapping of selected peats and peatified plant tissuesIn: Peat 90; international conference on peat production and use /ed. R. Sopo, The association of finnish peat industries, 1990. - pp. 148-163