1. Proper forcing;Abraham,2010
2. The structure and classification of topological spaces and cardinal invariants;Arhangel'skiĭ;Usp. Mat. Nauk,1978
3. On compact Hausdorff spaces of countable tightness;Balogh;Proc. Am. Math. Soc.,1989
4. A countably compact, countably tight, nonsequential space;Dow,1990
5. A. Dow, Compact C-closed spaces need not be sequential, preprint, 2015.