Madrid:Buying tickets to Teatro de la Zarzuela online?

We would like to buy tickets for the March 7th zarzuela at the Teatro de la Zarzuela. Can these tickets be bought online? I checked the Teatro's own website ( http://teatrodelazarzuela.mcu.es/ ) and couldn't find a link for online sales. Thanks!

footloose, if you go to the Teatro de la Zarzuela website go to Welcome, and the click on information. Then Seasons and Regular tickets and finally "Sales points".

You'll reach this page .

It seems you can buy them from the Servicaixa service (operated by the Spanish savings bank La Caixa ) with some commission.