A Unified Strategy for Formal Derivation and Proof of Binary Tree Nonrecursive AlgorithmsZhengkang ZUO, Zhipeng HUANG, Yue FANG, Qing HUANG, Yuan WANG and Changjing WANGWuhan Univ. J. Nat. Sci., 27 5 (2022) 415-423DOI: https://doi.org/10.1051/wujns/2022275415