Citations refer to the original publication, not to a Scieee localized version.
Llibre, J., & Paşca, D. (2005). Periodic orbits of the planar collision restricted 3-body problem. Centre de Recerca Matemàtica. https://ddd.uab.cat/record/44137
Llibre, Jaume, and Daniel Paşca. Periodic orbits of the planar collision restricted 3-body problem. Centre de Recerca Matemàtica, 2005. https://ddd.uab.cat/record/44137.
Llibre, Jaume, and Daniel Paşca. Periodic orbits of the planar collision restricted 3-body problem. Centre de Recerca Matemàtica, 2005. https://ddd.uab.cat/record/44137.
Llibre, J. and Paşca, D. (2005) Periodic orbits of the planar collision restricted 3-body problem. Centre de Recerca Matemàtica. Available at: https://ddd.uab.cat/record/44137.
J. Llibre and D. Paşca, “Periodic orbits of the planar collision restricted 3-body problem,” Centre de Recerca Matemàtica, 2005. [Online]. Available: https://ddd.uab.cat/record/44137
@misc{llibre2005periodic,
author = {Llibre, Jaume and Paşca, Daniel},
title = {Periodic orbits of the planar collision restricted 3-body problem},
year = {2005},
publisher = {Centre de Recerca Matemàtica},
url = {https://ddd.uab.cat/record/44137}
}
The source metadata has no journal, volume or pages. Add them from the original publication if your citation needs them.