@article {welch_branch-and-bound_1982, title = {Branch-and-bound search for experimental designs based on D optimality and other criteria}, journal = {Technometrics}, volume = {24}, number = {1}, year = {1982}, pages = {41{\textendash}48}, url = {http://www.tandfonline.com/doi/abs/10.1080/00401706.1982.10487707}, author = {Welch, William J.} }