  This article summarizes the talks in the session GW2 of the Sixteenth Marcel
Grossmann Meeting on Recent Developments in Theoretical and Experimental
General Relativity, Gravitation, and Relativistic Field Theories, 5-10 July,
2021, on Mid-frequency (0.1-10 Hz) gravitational waves: Sources and detection
methods with a review on strain power spectral density amplitude of various
mid-frequency gravitational wave projects/concepts and with extended summaries
on the progress of ZAIGA project and on the conceptual study of AMIGO.
