@techreport{SisLab2800,
          number = {TR2017-FIT-001},
           month = {December},
            type = {Technical Report},
           title = {Catalan Number},
          author = {Phuong Ho},
       publisher = {VNU-UET Technical Report},
            year = {2017},
             url = {https://eprints.uet.vnu.edu.vn/eprints/id/eprint/2800/},
        abstract = {Da?y s{\^o}? Catalan la? m{\^o}?t trong nh??ng da?y s{\^o}? quan tro?ng trong T{\^o}? h??p. Ba?i vi{\^e}?t na?y tri?nh ba?y m{\^o}?t s{\^o}? ba?i toa?n li{\^e}n quan {\dj}{\^e}?n da?y s{\^o}? Catalan va? ca?ch ch??ng minh m{\^o}?t s{\^o}? la? s{\^o}? Catalan. H? th?ng nh?ng b{\`a}i t?p n{\`a}y {\dj}??c s? d{\d u}ng trong vi?c hu?n luy?n c{\'a}c {\dj}?i tuy?n thi IOI, ACM.}
}