PESSI, Y. Results from a soil improvement and fertilizing test on fen land at Leteensuo. Agricultural and Food Science, [S. l.], v. 33, n. 1, p. 223–232, 1961. DOI: 10.23986/afsci.71555. Disponível em: https://journal.fi/afs/article/view/71555. Acesso em: 8 may. 2024.