@incollection {key690272m,
AUTHOR = {Abikoff, W. and Appel, K. and Schupp,
P.},
TITLE = {Lifting surface groups to \$\mathrm{SL}(2,\mathbb{C})\$},
BOOKTITLE = {Kleinian groups and related topics},
EDITOR = {Gallo, D. M. and Porter, R. M.},
SERIES = {Lecture Notes in Mathematics},
NUMBER = {971},
PUBLISHER = {Springer},
ADDRESS = {Berlin},
YEAR = {1983},
PAGES = {1--5},
DOI = {10.1007/BFb0067067},
NOTE = {(Oaxtepec, Mexico, 10--14 August 1981).
MR:690272. Zbl:0531.30037.},
ISSN = {0075-8434},
ISBN = {9783540394266},
}