A 7-Channel High-${T}_ text{c}$ SQUID-Based On-Scalp MEG System. - Christoph Pfeiffer; Silvia Ruffieux; Lars Jönsson; Maxim L. Chukharkin; Alexei Kalaboukhov; Minshu Xie; Dag Winkler; Justin F. Schneiderman (IEEE Trans. Biomed. Eng., 2020)