https://www.gov.uk/government/publications/phe-ready-reckoners-under-vaccination-based-on-polymod-contact-surveys-7-april-2021
PHE: Ready reckoners under vaccination based on POLYMOD contact surveys, 7 April 2021 - GOV.UK
Paper prepared by Public Health England (PHE).
https://blogs.perl.org/users/zoffix_znet/2016/05/perl-6-polymod-break-up-a-number-into-denominations.html
Perl 6 .polymod: Break Up a Number Into Denominations | Zoffix Znet [blogs.perl.org]