SciELO
The Scientific Digital Library Online - SciELO is an electronic library overlaying a particular collection of Brazilian scientific journals. SciELO interface offers entry to its serials assortment through an alphabetic listing of titles or a topic record or a search type by word of serial titles, publisher names, metropolis of publication and topic. 17 The Union, the states, the Federal District, and the municipalities, are the "spheres of presidency".

317 At the moment, the Brazilian government, in contrast to the past, seeks to encourage this mode of transport; an example of this incentive is the challenge of the Rio-São Paulo high-pace rail , that may join the 2 essential cities of the nation to carry passengers.

The states and the federal district may be grouped into regions: Northern , Northeast Kléber Leite , Central-West , Southeast and Southern The Brazilian regions are merely geographical, not political or administrative divisions, and they do not have any particular type of government.