@techreport{OrdyniakSzeider21tr,
 author = {Sebastian Ordyniak and Andr\'{e} Schidler and Stefan Szeider},
 institution = {Algorithms and Complexity Group, TU Wien},
 number = {AC-TR-21-002},
 title = {Parameterized Complexity of Small Decision Tree Learning},
 url = {http://www.ac.tuwien.ac.at/files/tr/ac-tr-21-002.pdf},
 year = {2021}
}