- 1080/03093640500238915. PMID 16466156. S2CID 7166949.
Brehm MA,
Beelen A,
Doorenbosch CA,
Harlaar J,
Nollet F (October 2007). "Effect of carbon-composite knee-ankle-foot...
- ISSN 0341-2695. PMC 2323412. PMID 17333186. Brehm, Ma; Beelen, A;
Doorenbosch, Cam; Harlaar, J; Nollet, F (2007). "Effect of carbon-composite knee-ankle-foot...