@techreport {TR-1993-022,
   type = {Technical Report},
   author = {Andrzej Proskurowski, Maciej M. Syslo, Pawel Winter},
   title = {Plane embeddings of 2-trees and biconnected partial 2-trees },
   institution = {University of Oregon, Computer and Information Sciences Department},
   number = TR-1993-022,
   month = 10,
   year = 1993,
   note = {Available at \url{https://www.cs.uoregon.edu/Reports/TR-1993-022.pdf}},
}