W.Y.C. Chen, L.W. Shapiro and L.L.M. Yang,
Parity reversing involutions on plane trees and 2-Motzkin paths,
European J. Combin. 27(2) (2006) 283-289.
Cited by
W.Y.C. Chen, L.W. Shapiro and L.L.M. Yang,
Parity reversing involutions on plane trees and 2-Motzkin paths,
European J. Combin. 27(2) (2006) 283-289.
Cited by