- Authors: Rocha Ana C., Lima Diana, Santos Sérgio M., Duarte Armando C., Esteves Valdemar, Santos Eduarda
- Título: FTIR evidence of long-yerm effects of different types of organic fertilization on the composition of soil humic substances.
- Conference Title: 1st European Chemistry Congress
- Conference Location: Budapest, Hungary
- Conference Date: 27 – 31 August
- Year Published: 2006