Commission "IP Guidelines and Endorsement", Guidelines for Integrated Production of Soft Fruits. Technical Guideline III. Edited by: E. Jörg & J.V. Cross. ISBN 92-9067-121-1.
Commission "IP Guidelines and Endorsement", Guidelines for Integrated Production of Soft Fruits. Technical Guideline III. Edited by: E. Jörg & J.V. Cross. ISBN 92-9067-121-1.