Bergstra, J. A.; Goeman, H. J. M.; Ollongren, A.; Terpstra, G. A.; Van der Weide, Th. P. Axioms for multilevel objects. (English) Zbl 0439.68033 Ann. Soc. Math. Pol., Ser. IV, Fundam. Inf. 3, 171-180 (1980). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page MSC: 68P05 Data structures Keywords:multi-level data structures; programming PDF BibTeX XML Cite \textit{J. A. Bergstra} et al., Ann. Soc. Math. Pol., Ser. IV, Fundam. Inf. 3, 171--180 (1980; Zbl 0439.68033)