@article{AIHPD_2022__9_3_543_0,
     author = {Machacek, John},
     title = {Boundary measurement and sign variation in real projective space},
     journal = {Annales de l{\textquoteright}Institut Henri Poincar\'e D},
     pages = {543--565},
     volume = {9},
     number = {3},
     year = {2022},
     doi = {10.4171/aihpd/125},
     mrnumber = {4525140},
     zbl = {1510.14035},
     language = {en},
     url = {http://www.numdam.org/articles/10.4171/aihpd/125/}
}