Below is a summary of some informative articles from the Dlubal website.
Verification Examples
Shallow Foundation on Cohesive Soil – Comparison of Analysis Results from RFEM 6 and Plaxis3D
https://www.dlubal.com/en/downloads-and-information/examples-and-tutorials/verification-examples/000218
Triaxial Test of Elastic-Plastic Soil in Drained Conditions
https://www.dlubal.com/en/downloads-and-information/examples-and-tutorials/verification-examples/000500
FAQ
The terrain surface of my soil to be analyzed is uneven. How can I edit the geometry of my soil massif for the modeling?
https://www.dlubal.com/en/support-and-learning/support/faq/005255
What value can I use for cohesion in order to avoid singularities?
https://www.dlubal.com/en/support-and-learning/support/faq/005254
Why is it not reasonable to analyze nonlinear soil material models with load combinations?
https://www.dlubal.com/en/support-and-learning/support/faq/005357