Evolution and painting of SB in Soviet service Prototypes
Evolution and painting of SB in Soviet AF service flat-engined variants: SB 2M-100, M-100A, M-103
Evolution and painting of SB in Soviet AF service sharp-engined variants: SB 2M-103A/U, M-104, M-105
Evolution and painting of USB in Soviet AF service all training variants
Ar-2 The last operative member of SB family, plus SB-MMN and SBB prototypes

Bibliography:

Tupolev SB of M.Maslov, ed. Icarus : the main reference on this subject of SB and derivatives in English.

Airwar 064 and 065: very wide and complete monographs, in Russian

Tupolew SB, Monografie Lotnicze n.083, very good monograph im Polish

Squadron-Signal in Action n.194- Tupolev SB: nice monograph in English with a lot of good photos.

Links:

http://crimso.msk.ru/Site/Crafts/Craft20867.htm is an excellent gallery of photos, profiles and scale drawings.

http://scalemodels.ru/modules/forum/viewtopic_t_4728_start_0.html good general topic on SB in Russian

http://wp.scn.ru/en/ww15/b/44/1/1 a wide collection of profiles of SB

http://nnm.ru/blogs/shamba/hronika_propavshego_bombardirovshika/ photographic report of the discovery of a wreck. In Russian.

http://www.avia-n-aero.ru/photo.php a mine of photos, many of which taken by German soldiers during Barbarossa and showing lots of SB, forthemost wrecked.