Journal article (1996) - AJ Steinfort (author), PMLO Scholte (author), RL Johson (author), ARHF Ettema (author), F. Tuinstra (author), M Nielsen (author), E Landemark (author), DM Smilgies (author), R Feidenhans'l (author), G Falkenberg (author), L Seehofer (author)