↑ abN. GregoryN.G.MankiwN. GregoryN.G., MatthewM.WeinzierlMatthewM., DannyD.YaganDannyD., Optimal Taxation in Theory and Practice, „Journal of Economic Perspectives”, 23 (4), 2009, s. 147–174, DOI: 10.1257/jep.23.4.147, ISSN0895-3309 [dostęp 2019-04-08](ang.).
↑LouisL.KaplowLouisL., Optimal Taxation, Peter KennethP.K.Newman (red.), [w:] The New Palgrave Dictionary of Economics, London: Palgrave Macmillan UK, 2008, DOI: 10.1057/978-1-349-95121-5_1574-2, ISBN 978-1-349-95121-5 [dostęp 2019-04-08](ang.).???
↑N GregoryN.G.MankiwN GregoryN.G., Spreading the Wealth Around: Reflections Inspired by Joe the Plumber, „Eastern Economic Journal”, 36 (3), 2010, s. 285–298, DOI: 10.1057/eej.2010.22, ISSN0094-5056 [dostęp 2019-04-09](ang.).
↑MikhailM.GolosovMikhailM., AlehA.TsyvinskiAlehA., Optimal Fiscal and Monetary Policy (with Commitment), Peter KennethP.K.Newman (red.), [w:] The New Palgrave Dictionary of Economics, London: Palgrave Macmillan UK, 2008, s. 1–6, DOI: 10.1057/978-1-349-95121-5_2140-1, ISBN 978-1-349-95121-5 [dostęp 2019-04-08](ang.).???
↑MikhailM.GolosovMikhailM., AlehA.TsyvinskiAlehA., Optimal Fiscal and Monetary Policy (Without Commitment), Peter KennethP.K.Newman (red.), [w:] The New Palgrave Dictionary of Economics, London: Palgrave Macmillan UK, 2008, s. 1–4, DOI: 10.1057/978-1-349-95121-5_2821-1, ISBN 978-1-349-95121-5 [dostęp 2019-04-08](ang.).???