An improvement of Goldberg, Plotkin, and Vaidja's maximal node disjoint paths algorithm, Kazuo Iwano
@TechReport{ibm-rt-0001,
  author = 	 "Kazuo Iwano",
  title = 	 "An improvement of Goldberg, Plotkin, and Vaidja's
		  maximal node disjoint paths algorithm",
  institution =  "IBM Tokyo Research Laboratory",
  year = 	 1989,
  number =	 "IBM TRL Research Report: RT 0001"
}