@article{MM2_1997__93_4_156298,
     author = {Toshiaki Adachi and S. Maeda and K. Ogiue},
     title = {Extrinsic shape of circles and standard imbeddings of projective spaces.},
     journal = {Manuscripta mathematica},
     pages = {267--272},
     publisher = {mathdoc},
     volume = {93},
     number = {4},
     year = {1997},
     zbl = {0881.53045},
     url = {http://geodesic.mathdoc.fr/item/MM2_1997__93_4_156298/}
}