Riordan, John The enumeration of trees by height and diameter. (English) Zbl 0097.25201 IBM J. Res. Dev. 4, 473-478 (1960). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 9 Documents Keywords:combinatorics PDF BibTeX XML Cite \textit{J. Riordan}, IBM J. Res. Dev. 4, 473--478 (1960; Zbl 0097.25201) Full Text: DOI OpenURL