The Australian Transport Safety Bureau
ATSB Transport Safety Report
MH370 – Flight Path Analysis Update
AE-2014-054
8 October 2014

Quote: '"Extrapolating paths and limiting the southern boundary by the MRC intersection with the 7th arc provides an area between approximately 33.5°S and 38.3°S at 0019 (7th arc)." (i.e.: covering both, http://archimedes.soup.io/post/467527777/ and http://archimedes.soup.io/post/472966517/)