MathSciNet bibliographic data MR301102 (46 #260) 20E30 Karrass, A.; Solitar, D. Subgroups of ${\rm HNN}$${\rm HNN}$ groups and groups with one defining relation. Canad. J. Math. 23 (1971), 627–643. Article

For users without a MathSciNet license , Relay Station allows linking from MR numbers in online mathematical literature directly to electronic journals and original articles. Subscribers receive the added value of full MathSciNet reviews.

 American Mathematical Society 201 Charles Street Providence, RI 02904-6248 USA