@techreport{KovacsLachnitSzeider20tr,
 author = {Laura Kov{\'{a}}cs and
Hanna Lachnitt and
Stefan Szeider},
 institution = {Algorithms and Complexity Group, TU Wien},
 number = {AC-TR-20-012},
 title = {Formalizing Graph Trail Properties in Isabelle/HOL},
 url = {http://www.ac.tuwien.ac.at/files/tr/ac-tr-20-012.pdf},
 year = {2020}
}