mathematical marxian models Ive been doing some superficial reading on Feldman-Mahalanobis Model and have been wondering what other equations and "brand name" models that have been prodouced by marxist economists?

What other mathematical Marxian models are out there?
Paul Samuelson wrote a series of papers formalizing Marxian economics, e.g. 
https://www.sciencedirect.com/science/article/pii/B9780123567505500177