Finite presentability of HNN extensions of inverse semigroups. (English)
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HNN extensions of semilattices. (English)
Int. J. Algebra Comput. 9, No.5, 555-596 (1999).
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HNN extensions of inverse semigroups and applications. (English)
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Isbell’s zigzag theorem and its consequences. (English)
Hofmann, Karl H. (ed.) et al., Semigroup theory and its applications. Proceedings of the 1994 conference commemorating the work of Alfred H. Clifford, New Orleans, LA, USA, March 1994. Cambridge: Cambridge University Press. Lond. Math. Soc. Lect. Note Ser. 231, 81-91 (1996).
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