WEN-CHIN CHENNi, Wen-ChunWen-ChunNi2020-05-042020-05-041994https://scholars.lib.ntu.edu.tw/handle/123456789/490334On the Average Altitude of Heap-Ordered Trees.journal article10.1142/S0129054194000062https://doi.org/10.1142/S0129054194000062