@article{10_37236_7680,
     author = {Ryan R. Martin and Abhishek Methuku and Andrew Uzzell and Shanise Walker},
     title = {A simple proof for a forbidden subposet problem},
     journal = {The electronic journal of combinatorics},
     year = {2020},
     volume = {27},
     number = {1},
     doi = {10.37236/7680},
     zbl = {1446.05089},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/7680/}
}