@article{Jimenez2018vortex,
 author = {Noé Jiménez and Vicent Romero-García and Luis M. García-Raffi and Francisco Camarena and Kestutis Staliunas},
 doi = {https://doi.org/10.1063/1.5029424},
 issn = {0003-6951},
 journal = {Applied Physics Letters},
 month = {5},
 number = {20},
 pages = {204101},
 title = {Sharp acoustic vortex focusing by Fresnel-spiral zone plates},
 url = {https://aip.scitation.org/doi/10.1063/1.5029424},
 volume = {112},
 year = {2018}
}