1. J.C. Alexander, A simplicial Hopf map, Department of Mathematics, University of Maryland, TR78-18, Preprint, 1978
2. Diskrete Räume;Alexandroff;Mat. Sb. (N.S.),1937
3. Quasifaserungen und unendliche symmetrische Produkte;Dold;Ann. of Math.,1958
4. Quasifibration and adjunction;Hardie;Pacific J. Math.,1978
5. Homotopy theory of finite and locally finite T0-spaces;Hardie;Exposition Math.,1993