HTH

If it's the natural process that gets wine to be sparkling. There are different types of fermentation so it's up to you to choose the one that suits your text. See link:
http://en.wikipedia.org/wiki/Fermentation_(wine)

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Note added at 20 mins (2008-11-08 17:39:19 GMT)
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I guess the right term is "bottle fermentation" because it implies "presa di spuma" as well...

http://it.wikipedia.org/wiki/Metodo_champenoise
http://it.wikipedia.org/wiki/Presa_di_spuma

I am adding a quotation.
"La spumantizzazione con il metodo classico consiste in una lentissima fermentazione in bottiglia ed in lungo invecchiamento in presenza di lieviti."
www.vinofaidate.com/la-produzione-dello spumante/68-la-spumantizzazione-con-il-metodo-classico.html

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Note added at 44 mins (2008-11-08 18:03:38 GMT)
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The frase "production of sparkling wine" gives 3,920 Google hits.
I am adding an example of its usage.
"A process for the production of sparkling wine, wherein during secondary fermentation a second yeast portion having a reduced autolysis stability is added."
www.freepatentsonline.com/4948598.html

Pnina is quite close.

"Spumantizzazione" here specifies which sparkling winemaking method - the classic method in this case - was used for this product and "presa di spuma" (prise de mousse) refers to bottle refermentation.

HTH

Giles