1. When was asymptotic freedom discovered?;‘tHooft;Nucl Phys B,2000
2. Confinement of quarks;‘tHooft;Nucl Phys A,2003
3. Perturbative confinement;‘tHooft;Nucl Phys B,2003
4. Quarks confinement – a simple mathematical derivation;El Naschie;C, S & F,2008
5. Deriving quarks confinement from the topology of quantum spacetime and heterotic string theory;El Naschie;C, S & F,2008