@article{JTNB_2003__15_1_223_0,
     author = {Ku\v{c}era, Radan},
     title = {A note on circular units in $\mathbb {Z}_p$-extensions},
     journal = {Journal de th\'eorie des nombres de Bordeaux},
     pages = {223--229},
     publisher = {Universit\'e Bordeaux I},
     volume = {15},
     number = {1},
     year = {2003},
     mrnumber = {2019013},
     zbl = {02058866},
     language = {en},
     url = {http://www.numdam.org/item/JTNB_2003__15_1_223_0/}
}