@article{JOLT_2004_14_2_a2,
     author = {Y. Yoshii},
     title = {Root {Systems} {Extended} by an {Abelian} {Group} and their {Lie} {Algebras<!--} {Anfang} {Autor} -->},
     journal = {Journal of Lie Theory},
     pages = {371--394},
     year = {2004},
     volume = {14},
     number = {2},
     doi = {10.5802/jolt.342},
     zbl = {1087.17008},
     url = {https://jolt.centre-mersenne.org/articles/10.5802/jolt.342/}
}