Online toegang naar https://www.sciencedirect.com/science/link?ref_val_fmt=info:ofi/fmt:kev:mtx:journal&svc_val_fmt=info:ofi/fmt:kev:mtx:sch_srv&rfr_dat=saltver:1&rfr_dat=origin:ONECATE&ctx_enc=info:ofi/enc:UTF-8&ctx_ver=Z39.88-2004&rft.issn=01683659&rft.volume=206&rft.spage=91&rfr_dat=md5:a4cc0b762043e8e6a8329a413e024db1
