You haven't done your homework.
G. Malykin's treatise has over 300 references, and yet, it missed one of the most important ones, a paper published by Dr. Silberstein in 1922.
In 1922, Dr. Silberstein published a second paper on the subject, where he generalizes the nature of the rays arriving from the collimator:
http://gsjournal.net/Science-Journals/Historical%20Papers-Mechanics%20/%20Electrodynamics/Download/2645This paper explains the issue raised by Malykin, but evidently missed by him.
Why is this SO IMPORTANT?
From Malykin's paper, section 5.5, Sagnac Effect and Coriolis Forces
The author of Ref. [27] thought that the effect of Coriolis forces
on counterpropagating waves in a three-mirror ring interferometer
accounted for the optical path of a wave travelling
in the direction of rotation in the form of a triangle with
somewhat convex sides; a wave spreading in the opposite
direction had an optical path in the form of a triangle with
somewhat concave sides. For this reason, the triangles had
different areas. Hence, the relative time delay between the
counterpropagating waves, the additional travel time of each
wave dependent on the Sagnac effect being proportional to
the closed contour area [35].
After a little while, however, A Lunn [70] showed that the
triangles are actually equal in area even though their contours
for counterpropagating waves are not quite coincident during
rotation (the contribution of the deflection of each counterpropagating
light beam caused by the Coriolis forces to a
change of the contour area is totally compensated for by the
contribution from the altered angle of incidence on the next
mirror). It is easiest to demonstrate the equality of contour
areas for counterpropagating waves in a fixed frame of
reference where Coriolis forces are lacking. In such a case,
only rotations of reflecting mirrors at given moments need to
be taken into consideration as was done by M Laue [69].
However, Dr. Silberstein answered Lunn's paper in 1922, and showed that Lunn's explanation was incomplete.
Malykin MISSED this most important reference.
But not me.
Had Malykin read the 1922 reference, he could not have dismissed Silberstein's papers.
Question: did Malykin actually know of the 1922 publication by Silberstein, but chose not to include it on his list of references?