@article{TM_2008__2008_20_256864,
     author = {Milan Janji\'c},
     title = {Geometrical definition of {Pi} and its approximations by nested radicals},
     journal = {The Teaching of Mathematics},
     pages = {25},
     publisher = {mathdoc},
     volume = {2008},
     number = {20},
     year = {2008},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/item/TM_2008__2008_20_256864/}
}