Hello, someone of the mailinglist sent me the two following references [1] Bandettini PA, Wong EC, Hinks RS, Tikofsky RS, Hyde JS. Time course EPI of human brain function during task activation. Magn Reson Med. 1992;25(2):390-7. [2] Bandettini PA, Jesmanowicz A, Wong EC, Hyde JS. Processing strategies for time-course data sets in functional MRI of the human brain. Magn Reson Med. 1993 Aug;30(2):161-73. which were intersting to see the processing strategies from the early days of fmri.