ROCHA-BUELVAS, Anderson; HIDALGO-TROYA, Arsenio  and  HIDALGO-ERASO, Ángela. Barriers of access to oral health care among university students in southern Colombia, 2011. A multivariate analysis. rev.fac.med. [online]. 2014, vol.62, n.4, pp.521-528. ISSN 0120-0011.