@article{10_4064_fm221_9_2016,
     author = {Emanuele Frittaion},
     title = {Brown{\textquoteright}s lemma in second-order arithmetic},
     journal = {Fundamenta Mathematicae},
     pages = {269--283},
     publisher = {mathdoc},
     volume = {238},
     number = {3},
     year = {2017},
     doi = {10.4064/fm221-9-2016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm221-9-2016/}
}