Pattern Alterations: Gaping Armhole Tutorial

http://www.mesewcrazy.com/2014/02/how-to-add-a-side-dart-for-proper-fit.html

http://craftprettysweet.blogspot.com/2011/06/gaping-armhole-tutorial.html

http://strikesmyfancy-2013.blogspot.com/2013/07/part-7-fine-tuning-samplemaking.html

http://www.sewcountrychick.com/add-side-dart-to-fix-gaping-armhole/

http://inhousepatterns.com/blogs/news/5962007-fitting-and-pattern-correction-armhole