Around 1900 the Bulgarian Social Democrats were only a marginal group, with no more than a few hundred members. In 1903, following the discussion on revisionism, the SDAPB split in two, a more flexible faction and a more rigid one. The two new parties both claimed to be the SDAPB, but in practice they were known as the "Broads" and the "Narrows". The Narrows became even more restricted in 1905. The workers felt dominated by the intellectuals, and formed the 'Social Democratic Workers Union: The Proletarian". "The Proletarian" alienated one fifth of the Narrow SDAPB's adherents and later on joined the Broads. Rabotniceskij Vestnik was the Narrows' newspaper.