From: A survey of fuzzy logic in wireless localization
IFP
[21, 34, 36,37,38,39, 41, 47, 50, 51, 64, 79, 82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99]
Pre-AFP
[26, 53, 90, 100,101,102,103,104,105,106]
Post-AFP
[59, 61, 63, 67, 107,108,109]
Hybrid
[79,80,81]