@article{10_4064_sm184_2_6,
     author = {Antonio J. Guirao},
     title = {On the local moduli of squareness},
     journal = {Studia Mathematica},
     pages = {175--189},
     year = {2008},
     volume = {184},
     number = {2},
     doi = {10.4064/sm184-2-6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm184-2-6/}
}