1. Abramenko, P., Mühlherr, B.: Présentations de certaines $$BN$$ B N -paires jumelées comme sommes amalgamées. C. R. Acad. Sci. Paris Sér. I Math. 325(7), 701–706 (1997)
2. Abramenko, P., Rémy, B.: Commensurators of some non-uniform tree lattices and Moufang twin trees, essays in geometric group theory. In: Ramanujan Math. Soc. Lect. Notes Ser., vol. 9, pp. 79–104. Ramanujan Math. Soc., Mysore (2009)
3. Barnea, Y., Ershov, M., Weigel, T.: Abstract commensurators of profinite groups. Trans. Am. Math. Soc. 363(10), 5381–5417 (2011)
4. Barnea, Y., Larsen, M.: A non-abelian free pro- $$p$$ p group is not linear over a local field. J. Algebra 214(1), 338–341 (1999)
5. Bourbaki, N.: Éléments de mathématique. Lie IV–VI, Actualités Scientifiques et Industrielles, No. 1337. Hermann, Paris (1968)