@article{bdll2019,
 author = {Behr, Nicolas and Dattoli, Giuseppe and Lattanzi, Ambra and Licciardi, Silvia},
 doi = {10.3390/axioms8030077},
 issn = {2075-1680},
 journal = {Axioms},
 number = {3},
 pages = {77},
 publisher = {MDPI AG},
 title = {Dual {{Numbers}} and {{Operational Umbral Methods}}},
 volume = {8},
 year = {2019}
}