@article{10_1017_S0017089500002135,
     author = {Bibby, John},
     title = {Axiomatisations of the average and a further generalisation of monotonic sequences},
     journal = {Glasgow mathematical journal},
     pages = {63--65},
     year = {1974},
     volume = {15},
     number = {1},
     doi = {10.1017/S0017089500002135},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500002135/}
}