@article{CRMATH_2015__353_5_455_0,
     author = {Matveev, Vladimir S. and Nikolayevsky, Yuri},
     title = {A counterexample to {Belgun{\textendash}Moroianu} conjecture},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {455--457},
     year = {2015},
     publisher = {Elsevier},
     volume = {353},
     number = {5},
     doi = {10.1016/j.crma.2015.03.001},
     language = {en},
     url = {https://numdam.org/articles/10.1016/j.crma.2015.03.001/}
}