The image pictured here a reproduction of Dostoevsky's notes for Chapter 5 of the Brother's Karamzov.

The full text of the Dostoevskii's complete works is available in several places.  One of the most authoritative editions, complete with annotation is available from Pushkinskii Dom.  In addition, you can also access Достоевский: Материалы и исследования.

Lib.ru

http://az.lib.ru/d/dostoewskij_f_m/  

is yet another source for the complete works of Dostoeveskii.  this is a very useful site with links to online copies of the works of many Russian authors.  It draws its texts from some of the earliest editions of the author's works and included critical literature as well.

If you are interested in one of the older editions one is available from the Russian State Library in their full text resources at http://www.rsl.ru

Another library source that is frequently overlooked is the Предментный Каталог at the Russian State Historical Library which can be accessed at http://predmet.shpl.ru/scripts/uis/main.php. This is a very unusual catalog that sites articles and books and organizes them by topic. It is a convenient place to orient oneself to many of the major publications on a writer. The critical literature is organized under the titles of each of the major works. There are some 200 entries under the heading Братья Карамазовы.