OmegaVolume 11, Issue 1, 1983, Pages 9-13FeedbackAuthor links open overlay panelShow moreShareCitehttps://doi.org/10.1016/0305-0483(83)90078-6Get rights and contentRecommended articlesReferences (0)Cited by (0)View full textCopyright © 1983 Published by Elsevier Ltd. All rights reserved.