Advertisement

Springer Nature is making Coronavirus research free. View research | View latest news | Sign up for updates

Naturwissenschaften aktuell

    • 14 Accesses

    This is a preview of subscription content, log in to check access.

    Rights and permissions

    Reprints and Permissions

    About this article

    Cite this article

    Naturwissenschaften aktuell. Naturwissenschaften 77, 454–456 (1990). https://doi.org/10.1007/BF01135954

    Download citation