Gerzabek M.H. Response of soil aggregate stability to manure amendments in the ultuna long-term soil organic matter experiment / M.H.Gerzabek,H.Kirchmann, 1995. - 257-260 p. p. - Текст : непосредственный.
The response of soil organic matter to manure amendments in a long-term experiment at Ultuna, Sweden / M.H.Gerzabek,F.Pichlmayer,H.Kirchmann,G.Haberhauer, 1997. - 273-282 p. p. - Текст : непосредственный.
Organic crop production - ambitions and limitations / ed.: H. Kirchmann, L. Bergstrom, 2008 r=on-line. - Текст : электронный.
Kirchmann H. Sulfur balances and sulfur-34 abundance in a long-term fertilizer experiment / H.Kirchmann,F.Pichlmayer,M.Gerzabek, 1996. - 174-178 p. p. - Текст : непосредственный.