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:
You can too download they from RapidShare.