This one
http://unusual-architecture.com/ufo-house-new-zealand/
http://dprbcn.wordpress.com/2009/09/...atti-suuronen/
I remember reading about it as a kid back in late '50-ies in one of magazines for popularisation of science !! :-)
Interestingly, the website is mentioning this design being done in '68 in Finland but I am VERY sure I was reading that article well before that, and New Zealand was mentioned.. Or, perhaps, it was another but VERY similar design
There were also two from the same batch here in Melbourne (in Caribbean Gardens, used as offices) but they were sold couple of years ago.
Just when I started to think to buy one of them
It seems there is another one still being used as a house somewhere near Frankston (or this is just a rumour?).