systematic sampling
Brewer sampling
Brewer's sampling is a statistical sampling method which was proposed by Brewer in 1975 and uses unequal probabibility sampling technique
Brewer, Kenneth RW (1975). A Simple Procedure For Sampling πpswor1. Australian Journal of Statistics, 17(3), 166-172.
Philippe Rocca-Serra
UPbrewer(pik,eps=1e-06)
from:
https://www.rdocumentation.org/packages/sampling/versions/2.8/topics/UPbrewer
Sampling R package
ready for release