[D] what do you do with paper with no code published

Many papers introduce their own models, mostly variants of existing one with little changes in the original ones (mostly for specific problems).
Most of them don't have code published which makes it very difficult to reproduce the results.
In some cases (could be even many cases, I only found/checked some) the experiment configuration is not complete, in the paper.

What do you do with such papers?

How do you argue when people quote these papers?

cases code found machinelearning paper papers results them variants