1. Detection coils;Carelli,1983
2. Superconducting quantum interference devices for low frequency measurements;Clarke,1977
3. Magnetic measurement and display of current generators in the brain. Part I: the 2-D detector;Cohen,1979
4. Instrumentation for biomagnetism;Duret;Il Nuovo Cimento,1983
5. A seven channel SQUID magnetometer for brain research;Ehnholm;Physica,1981