1. Anonymous: Effect of lignin sulfonate. Feedstuffs 1963, vol. 35, no. 13, 42.
2. Brüggemann, J., K. H. Niesar & H. Zucker: Pelletqualität und ihre Beeinflussung durch Presshilfsmittel auf Ligninsulfonatbasis. (Pellet quality, and lignosulphonate as pelletizing agent). Kraftfutter 1964, 1, 10–16.
3. Eberhardt, W.: Futterverpressung und Presshilfsstoff auf Ligninsulfonatbasis. (Pelleting of fodder, and lignosulphonate as food additive). Kraftfutter 1964, 1, 16–19.
4. Fossum, K.: Proteolytic enzymes and biological inhibitors I. Comparison between the Kunitz method and the agar gel casein precipitating reaction for determination of the activity of some commercial proteolytic enzymes and inhibtors. Acta path, microbiol. scand. 1970, 78 B, 350–362.
5. Fredericq, P.: Actions antibiotiques réciproques chez les Enterobacteriaceae. (Antibiotic interactions with Enterobacteriaceae). Rev. beige Path. 1948, 19, Suppl. 4, 1–9.