Properly Separating and Burning the Hafrashas Challah - Jul 26, 2016 - YIW BMP - Summer Learning Experience - Women's Halacha Shiur - Hafrashas Challah Series.
At the end of the shiur there is a brief overview of the status of ovens - it is an incomplete analysis, as it was not the main focus of this shiur.
For further clarification in English about the status of modern day ovens please see http://www.koltorah.org/ravj/milkmeatoven.htm