Measuring very small resistances, A Milliohm-meter [Analog Devices Wiki]
How to convert multimeter into high precision milliohmmeter - YouTube
Build an Accurate Milliohm Meter - Circuit Cellar
Build Your Very Own Low Resistance Meter with Arduino
2 Simple Milliohm Meter Circuits [Measure Low Resistances below 1 Ohm with these Circuits] | Homemade Circuit Projects
A milliohm adaptor for multimeters
A D.I.Y. Milli-Ohm-Meter Called the Walsmho : 4 Steps - Instructables
Milliohm Meter Version 1.5 - Barbouri's Electronics Projects
Open hardware Milliohmmeter, microohmmeter, microvoltmeter, and accurate ESR meter based on STM32F373 processor and AD8253 instrumentation amplifier (DIY do it yourself hobby construction)