Springer Lecture Notes in Computer Science
From the LNCS guidelines.
Other (as stated in the work)
Springer has provided LaTeX style files and example articles to help you prepare your paper for submission to their journals.
This template is for contributions to the Springer Lecture Notes in Computer Science (LNCS) , based on the llncs2e.zip file from their author guidance page, with
llncs.cls v2.20 (10 March 2018).
The style files and example paper are pre-loaded into writeLaTeX as a template - you can now create an LNCS-formatted document for editing online simply by clicking the image above.
For further information, please see their Information for LNCS Authors page, where you will find guidelines and technical instructions for the preparation of contributions.