@article{10_37236_10102,
     author = {Paul M. Rakoyomamonjy and Sandrataniaina R. Andriantsoa},
     title = {Crossings and nestings over some {Motzkin} objects and {\(q\)-Motzkin} numbers},
     journal = {The electronic journal of combinatorics},
     year = {2021},
     volume = {28},
     number = {3},
     doi = {10.37236/10102},
     zbl = {1472.05009},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/10102/}
}