1. Reconsidering IRA and Roth IRA: Keeping bequests and other options in mind;Al Zaman;Journal of Wealth Management,2008
2. Tax-efficient withdrawal strategies;Cook;Financial Analysts Journal,2015
3. Fidelity 2014a Four tax-efficient strategies in retirement www.fidelity.com/viewpoints/retirement/tax-savvy-withdrawals
4. Fidelity 2014b Detailed methodology: Fidelity retirement income planner Fidelity Investments http://personal.fidelity.com/planning/retirement/pdf/rip_methodology.pdf
5. Greenhouse , S. 2012 Should the 401(k) be reformed or replaced? New York Times http://www.nytimes.com/2012/09/12/business/retirementspecial/should-the-401-k-be-reformed-or-replaced.html?pagewanted=all