microeconomics - Where does the short-run and long-run costs intersect if $k$ is fixed? - Economics Stack Exchange
Short Run Average Costs: Marginal Cost, AFC, AVC, Formulas, etc
Economics in Plain English » From short to long: Economies of scale and the long-run average total cost curve
microeconomics - Why is the short run average cost curve not a tangent to the long run average cost curve at the lowest point on the short run average cost curve? -