@article{10_57016_TM_QDPS2407,
     author = {Quang Hung Tran and Manh Dung Tran},
     title = {A generalization of {Ptolemy's} theorem},
     journal = {The Teaching of Mathematics},
     pages = {104 },
     publisher = {mathdoc},
     volume = {XXVII},
     number = {2},
     year = {2024},
     doi = {10.57016/TM-QDPS2407},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.57016/TM-QDPS2407/}
}