09/01/1999 - "The objective of this study was therefore to examine the associations between duration of specific work and cancer incidence among employees in four Norwegian ferromanganese and silicomanganese producing plants. "
09/01/1999 - "Study of cancer incidence among 6363 male workers in four Norwegian ferromanganese and silicomanganese producing plants."
|2.||Parkinsonian Disorders (Parkinsonism)
12/01/1989 - "Several cases of parkinsonism were found in a ferromanganese smelter after the ventilation system had broken down and had not been repaired for eight months in 1985. "
12/01/1989 - "Manganese induced parkinsonism: an outbreak due to an unrepaired ventilation control system in a ferromanganese smelter."