1. Contact allergy to colophony, Chemical identifications of allergens, sensitization experiments and clinical experiences;Karlberg;Acta Dermato-venereol,1988
2. Naturharze Terpentinöl · Tallöl
3. Sampaio J T Portuguese gum rosin derivatives - present and future. Presentation at the 15th International Naval Stores Meeting 1988
4. McSweeney E E Arlt Jr H G Russell J. Tall oil and its uses (II) New York Pulp Chemical association, Inc. 25 26