Robinson, D. S. Joins of subnormal subgroups. (English) Zbl 0135.04805 Ill. J. Math. 9, 144-168 (1965). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 19 Documents Keywords:group theory PDFBibTeX XMLCite \textit{D. S. Robinson}, Ill. J. Math. 9, 144--168 (1965; Zbl 0135.04805)