@article{JOLT_2014_24_3_a13,
     author = {V. Del Barco},
     title = {Symplectic {Structures} on {Nilmanifolds:} an {Obstruction} for their {Existence}},
     journal = {Journal of Lie Theory},
     pages = {889--908},
     year = {2014},
     volume = {24},
     number = {3},
     doi = {10.5802/jolt.811},
     zbl = {1320.53098},
     url = {https://jolt.centre-mersenne.org/articles/10.5802/jolt.811/}
}