@book{BenkoePlescher2015,
  author    = {Marietta Benk{\"o} and Engelbert Plescher},
  title     = {Space law: reconsidering the definition/delimitation question and the passage of spacecraft through foreign airspace. (Essential air and space law ; 12)},
  isbn      = {9789462360761 ; 9462360766 ; 9789460948176},
  year      = {2015},
}