@article{TM2_2020_XXIII_2_a2,
     author = {Yu. N. Maltsev and A. S. Monastyreva},
     title = {On some properties of triangle $OIG$},
     journal = {The Teaching of Mathematics},
     pages = {102 },
     publisher = {mathdoc},
     volume = {XXIII},
     number = {2},
     year = {2020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TM2_2020_XXIII_2_a2/}
}