Robert Read, Lyn Thomas, Alan Washburn. Estimating means when sampling gives probabilities as well as values or "Looking a gift horse in the mouth". Statistics and Computing, 10(3):245-252, 2000. [doi]
@article{ReadTW00,
title = {Estimating means when sampling gives probabilities as well as values or "Looking a gift horse in the mouth"},
author = {Robert Read and Lyn Thomas and Alan Washburn},
year = {2000},
doi = {10.1023/A:1008995628693},
url = {http://dx.doi.org/10.1023/A:1008995628693},
researchr = {https://researchr.org/publication/ReadTW00},
cites = {0},
citedby = {0},
journal = {Statistics and Computing},
volume = {10},
number = {3},
pages = {245-252},
}