It is a research paper from Switzerland's famous university ETH Zürich. Some data for the research has been reportedly supplied by Herrenknecht.

It is included in the November 2021 issue of Elsevier's Automation in Construction periodical

Decision support system for an intelligent operator of utility tunnel boring machines
 

Authors = Gabriel Rodriguez Garcia Gabriel Michau, Herbert H.Einstein, Olga Fink

Received 2 December 2020, Revised 21 July 2021, Accepted 6 August 2021, Available online 23 August 2021.

https://www.sciencedirect.com/science/article/pii/S0926580521003319