[1] A. Asinowski and T. Mansour, Dyck paths with coloured ascents, European J. Combin, 29 no. 5
(2008) 1262–1279.
[2] A. Cayley, A theorem on trees, Quart. J. Math., 23 (1889) 376–378.
[3] N. Dershowitz and S. Zaks, Enumerations of ordered trees, Discret. Math., 31 no. 1 (1980) 9–28.
[4] E. Deutsch and M. Noy, Statistics on non-crossing trees, Discrete Math., 254 no. 1-3 (2002) 75–87.
[5] P. Flajolet and M. Noy, Analytic combinatorics of non-crossing configurations, Discret. Math., 204 no. 1-3 (1999) 203–229.
[6] P. Flajolet and R. Sedgewick, Analytic combinatorics, Cambridge University Press, Cambridge, 2009.
[7] N. S. S. Gu, N. Y. Li and T. Mansour, 2-binary trees: bijections and related issues, Discret. Math., 308 no. 7 (2008) 1209–1221.
[8] N. S. S. Gu and H. Prodinger, Bijections for 2-plane trees and ternary trees, European J. Combin., 30 no. 4 (2009) 969–985.
[9] N. S. S. Gu, H. Prodinger and S. Wagner, Bijections for a class of plane trees, European J. Combin., 31 no. 3 (2010) 720–732.
[10] D. E. Knuth, The art of computer programming, 1, Fundamental algorithms, Third edition, Addison-Wesley, Reading, MA, 1997.
[11] M. Noy, Enumeration of noncrossing trees on a circle, In Proceedings of the 7th Conference on Formal Power Series and Algebraic Combinatorics (Noisy-le-Grand, 1995), 180 (1998) 301–313.
[12] I. O. Okoth, Bijections for k-plane trees, Open J. Discret. Appl. Math, 5 no. 1 (2022) 29–35.
[13] I. O. Okoth, Enumeration of k-noncrossing trees and forests, Commun. Comb. Optim., 7 no. 2 (2022) 301–311.
[14] I. O. Okoth, On 2-noncrossing increasing trees, To appear in Open J. Discret. Appl. Math., (2021).
[15] I. O. Okoth and S. Wagner, Refined enumeration of k-plane trees and k-noncrossing trees, Annals of Combinatorics, (2023) 1-33.
[16] A. Panholzer and H. Prodinger, Bijections between certain families of labelled and unlabelled d-ary trees, Appl. Anal. Discrete Math., 3 (2009) 123–136.
[17] A. Panholzer and H. Prodinger, Bijection for ternary trees and non-crossing trees, Discret. Math., 250 no. 1-3 (2002) 115–125.
[18] S. X. M. Pang and L. Lv, K-Noncrossing Trees and K-Proper Trees, 2010 2nd International Conference on Information Engineering and Computer Science, Wuhan, (2010) 1–3.
[19] H. Prodinger, A simple bijection between a subclass of 2-binary trees and ternary trees, Discret. Math., 309 no. 4 (2009) 959–961.
[20] R. P. Stanley, Enumerative combinatorics, 2, With a foreword by Gian-Carlo Rota and appendix 1 by Sergey Fomin, Cambridge Studies in Advanced Mathematics, 62, Cambridge University Press, Cambridge, 1999.
[21] S. H. F. Yan and X. Liu, 2-noncrossing trees and 5-ary trees, Discrete Math., 309 no. 20 (2009) 6135–6138.