www.expatriationattorneys.com/giving-up-your-green-card/
www.goldinglawyers.com/what-is-expatriation-us/?utm
www.expatriationattorneys.com/long-term-resident-definition-irs/
www.expatriationattorneys.com/sailing-permit-departing-resident-irs/
www.duanemorris.com/alerts/surrendering_your_green_card_tax_immigration_issues_consider_0824.html