@article{JOLT_2015_25_3_a9,
     author = {T. Backhaus and C. Desczyk},
     title = {PBW {Filtration:} {Feigin-Fourier-Littelmann} {Modules} {Via} {Hasse} {Diagrams}},
     journal = {Journal of Lie Theory},
     pages = {815--856},
     year = {2015},
     volume = {25},
     number = {3},
     doi = {10.5802/jolt.862},
     zbl = {1359.17018},
     url = {https://jolt.centre-mersenne.org/articles/10.5802/jolt.862/}
}