Please bear in mind that if you mix-feed your baby (that is breastmilk and formula), some breastmilk is better than no breastmilk - so if it's mixed feeding or no breastmilk at all, keep up the mixed feeding! If you're giving your baby formula because you thought it was just as good as breastmilk, then please check out these articles.
Read any other interesting, credible articles? Let me know.