# Hankel function of the second kind
**Wikidata**: [Q109558856](https://www.wikidata.org/wiki/Q109558856)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Hankel_function_of_the_second_kind)  
**Source**: https://4ort.xyz/entity/hankel-function-of-the-second-kind


## References

1. ISO 80000-2:2019 Quantities and units — Part 2: Mathematics