@article{RSMUP_2021__145__205_0,
     author = {J. Miquel Mart{\'\i}nez},
     title = {An infinite family of counterexamples to a conjecture on positivity},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {205--206},
     volume = {145},
     year = {2021},
     doi = {10.4171/rsmup/79},
     mrnumber = {4261654},
     zbl = {1471.18022},
     language = {en},
     url = {http://www.numdam.org/articles/10.4171/rsmup/79/}
}