Annals of Pure and Applied LogicVolume 31, 1986, Page 121PrefaceAuthor links open overlay panelMark TamthaiShow moreShareCitehttps://doi.org/10.1016/0168-0072(86)90065-5Get rights and contentUnder an Elsevier user licenseopen archivePrevious article in issueNext article in issueRecommended articlesCited by (0)Copyright © 1986 Published by Elsevier B.V.