From a comment on my talk page:
Downtown:
[1] - provides 2005 retail sales figure at very bottom.
[2] - minor note, not really adding to notability, talking about the huge billboards around it.
[3] - actually, if you have the time, extend the signage discussion, as discussed in this article - even if the Wikipedia article calls it a bland building covered with garish signs - thats info, and adds to the article's quality. Also has some minor details about the centre referenced.
St Lukes:
[4] loads of minor and major info about St Lukes AND Downtown. Gives info on the time of name rebranding of Westfield Downtown. Has LOADS of info on St Lukes expansion and data on the mall itself.
Westcity
[5] Stage One of its existence.
[6] Info on the The Warehouse move into it.
[7] first NZ Village Skycity cinema (link to the Village Skycity article in Wikipedia too, please), same article also has info on the cinema in St Lukes.
[8] Mall turnover
[9] Some more info about its value.
[10] Already historical article, info on its previous ownership.