@article{10_4153_S0008439523000735,
     author = {Funano, Kei},
     title = {A universal inequality for {Neumann} eigenvalues of the {Laplacian} on a convex domain in {Euclidean} space},
     journal = {Canadian mathematical bulletin},
     pages = {222--226},
     year = {2024},
     volume = {67},
     number = {1},
     doi = {10.4153/S0008439523000735},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/S0008439523000735/}
}