@article{10_37236_7946,
     author = {Darij Grinberg},
     title = {Shuffle-compatible permutation statistics. {II:} {The} exterior peak set},
     journal = {The electronic journal of combinatorics},
     year = {2018},
     volume = {25},
     number = {4},
     doi = {10.37236/7946},
     zbl = {1398.05217},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/7946/}
}