@article{10_1017_S0017089500032596,
     author = {Barros, Manuel},
     title = {Free elasticae and {Willmore} tori in warped product spaces},
     journal = {Glasgow mathematical journal},
     pages = {265--272},
     year = {1998},
     volume = {40},
     number = {2},
     doi = {10.1017/S0017089500032596},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500032596/}
}