BibTex format
@article{Lukkarinen:2013:10.1017/S0004972712000639,
author = {Lukkarinen, J and Pakkanen, MS},
doi = {10.1017/S0004972712000639},
journal = {Bulletin of the Australian Mathematical Society},
pages = {400--405},
title = {On the positivity of Riemann–Stieltjes integrals},
url = {http://dx.doi.org/10.1017/S0004972712000639},
volume = {87},
year = {2013}
}