In the past I have referred you to the website of Randy Oliver. I have just received notification he has added five articles to the website. These article have been previously published in the two bee magazines. But if you don't subscribe to the magazines you haven't been able to read them. The articles are about:
Probiotics and Colony Productivity
A Test of Late-Summer Varroa Treatments
Is There A Multiplier Effect From The Feeding Of Sugar Syrup?
Light or Heavy Syrup For Drawing Foundation?
Beyond Taktic--Oxalic/glycerin shop towels
To read them go to his website. ScientificBeekeeping.com
Sometimes it takes a little frustrating searching to find a particular article.