@techreport{PeitlSzeider20tr,
 author = {Tom{\'{a}}{\v{s}} Peitl and Stefan Szeider},
 institution = {Algorithms and Complexity Group, TU Wien},
 number = {AC-TR-20-008},
 title = {Finding the Hardest Formulas for Resolution},
 url = {http://www.ac.tuwien.ac.at/files/tr/ac-tr-20-008.pdf},
 year = {2020}
}