I not sure where you can get articles on it, but ill offer my explainatio of it. An electromagnetic wave consists of two components. A magnetic field and an electric field. These oscilate about an axis that is parallel to the direction of propagation, and they oscilate at 90 degrees to each other. Take visible light for example. If you look at an unpolarised light source, the planes in which the electric field is osciliating will be in all possible directions (bare in mind that in polarisation it is the electric field component that is important). When looking through a linear polariser, Only one plane of polarisation is allowed through. So if you have a polariser that has its plane of polarisation parallel to a horizontal line on this page for example, only EM waves with an electric field component parallel to this line will pass through.
Thats the simple way of explaining it.
If you place now place a linear polariser in front of an unpolarised light source, you will as usual not really notice a chance in brightness. However if you now place another linear polariser in front of the current one at 0 degrees to it, again you will notice there is no change in brightness. However if you rotate the second filter, you will notice that the brightness falls slowly. it does not snap from bright to dark, like one might think - Specially if you think of it in terms of only one plane can pass (i know that's what i said, but it depends how deeply you want to understand the concept.). You now must think of light passing not being a statistical concept in terms of angle and brightness, but now think of it as a probability amplitude of whether or not the light passes. If the probability is high: the difference in angle of the two polarisers is small, then the brightness will be high. Hence is the angle is large, the brightness is low as this corresponds to a low probability amplitude.
What will really bake your noodle is the following. If you have the same setup as just mentioned, with two filters, that are at 90 degrees to each other, IE, no light should pass. if you now place a third filter at 90 degrees to the first, or 0 degrees to the second, you will get as expected, no light passing. however if you rotate the thrid, light will start to pass. This is again to do with the probability amplitude as a relation of the three filters.
Places where i find out about these sorts of things are quantum physics textbooks or any book on photonics.
Woody
EDIT: In terms of communications, you will know that you can block interference by polarising the EM waves that are being transmitted.