This book was almost unavailable the past months.

Today, i found two items of this work, hopeful may help to someone:

Nestorianna (1905)

Author: Nestorius, Patriarch of Constantinople Nestorius, Friedrich Loofs, Georg Kampffmeyer, Stanley Arthur Cook
Publisher: Niemeyer
Year: 1905
Possible copyright status: NOT_IN_COPYRIGHT
Language: German
Digitizing sponsor: Google
Book from the collections of: Harvard University
Collection: americana

They are Googlebooks volumes, and can be accessed via Internet Archive:

Here and     here.

You can too download they from RapidShare.