Petr Kolman, Martin Loebl
Lecture notes on the ellipsoid algorithm by M. Goemans
Lecture notes on interior point method by M. Goemans (see chapter 13)
Textbook Linear Programming by Howard Karloff, chapters 4 and 5 - available in the University library at Mala Strana.
Lecture notes on polynomial time LP algorithms by P. Kolman (in Czech)