Suppose I have 100 popsize, should I make 10 offspring? I want the best combination between popsize and offspring to achieve convergent quickly and please also include the paper.
There is not best offspring/population to every problem you can solve with genetic algorithm. Every problem has a best configuration, which is unknown , not only of offspring/population but also of mutation chance, chromosome design, etc...
With that said there are multiple solutions like total substitution, partial substitution, etc.. With it's own benefits and downsides. You should explore them and decide which one fits your problem the most.