@article{10_1017_S0017089599000579,
     author = {Boeckx, E. and Bueken, P. and Vanhecke, L.},
     title = {\ensuremath{\varphi}-symmetriccontact metric spaces},
     journal = {Glasgow mathematical journal},
     pages = {409--416},
     year = {1999},
     volume = {41},
     number = {3},
     doi = {10.1017/S0017089599000579},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089599000579/}
}