Using Greek farina (cake flour) instead of yeast for making bread whilst combined with general puproce flour
As you've clarified that farina is self-raising flour, you can use it in quick breads (soda breads). You can probably find a recipe that uses just this flour with no other leavening agents.

The plain flour would need something to make it rise. This should either be yeast or the chemical leaveners in the other flour, however if you just mix the two you won't have enough for much rise. So either add baking powder for a quick bread, add yeast for a traditional bread, or use it to make flatbread.