References
- Philos. Mag. v.28 On the analytical forms called trees A. Cayley
- v.4
- Graphs & Digraphs G. Chartrand;L. Lesniak
- Proc. Kon. Ned. Akad. v. Wetensch. v.67 The number of plane trees F. Harary;G. Prins;W. T. Tutte
- Theory and Application of Infinite Series K. Knopp
- Ars Combin v.56 The Expectation of Independent Domination Number over Random Binary Trees C. Lee
- Proc. Kon. Ned. v. Wetensch. v.76 The Expected Node-Independence Number of Random Trees A. Meir;J. W. Moon
- An Atlas of Graphs R. C. Read
- Generatingfuctionology H. S. Wilf