1- Becker, R, Enders, W, and Lee, J, (2006), "A stationary test in the presence of an unknown number of smooth breaks," Journal of Time Series Analysis, 27: 381-409.
2- Bernard, A and Steven, N.D, (1996), "Interpreting Tests of the Convergence Hypothesis, " Journal of Econometrics, 71, 61-173.
3- Busetti, F and Harvey, A.C, (2003), "Further comments on stationary tests in series with structural breaks at unknown points," Journal of Time Series Analysis, 24, 137-140.
4- Carlino, G and Mills, L, (1993), "Are U.S. regional economies converging? A time series analysis," Journal of Monetary Economics, 32, 335-346.
5- Carrion-i-Silvestre, J.L and Sansó, A, (2006), "A guide to the computation of stationary tests," Empirical Economics, 31, 433–448.
6- Carrion-i-Silvestre, J.L, Del Barrio-Castro, T, and López-Bazo, E, (2005), "Breaking the panels: An application to the GDP per capita, Econometrics Journal, 8, 159-175.
7- Clemente, J, Montanes, A and Reyes, M, (1998), "Testing for a unit root in variables with a double change in the mean," Economics Letters, 59(2), 175-182.
8- Cunado, J and Perez de Gracia, F, (2006), "Real convergence in Africa in the second half of the 20th century," Journal of Economics and Business, 58, 153-167.
9- Dickey, D.A and Fuller, W.A, (1981). Likelihood ratio statistics for autoregressive time series with a unit root. Econometrica, 49, 1057-72.
10- Harvey, D.I and Mills, T.C, (2003), "A note on Busetti-Harvey tests for stationary in series with structural breaks," Journal of Time Series Analysis, 24(2), 159-164.
11- Heston, A, Summers, R, and Aten, B, (2006), "Penn World Table Version 7," Center for International Comparisons of Production, Income and Prices, University of Pennsylvania.
12- Islam, N. (2003), " What Have we learnt from the convergence debate?" Journal of economic surveys, 17, 309-362.
13- Kapetanios, G, (2005), "Unit-root testing against the alternative hypothesis of up to m structural breaks," Journal of Time series Analysis, 26(1), 123-133.
14- King, A and Ramlogan, C, (2008), "Is Latin America catching up? A time series approach," Review of Development Economics, 12, 397-415.
15- Kurozumi, E, (2002), "Testing for stationary with a break," Journal of Econometrics, 108(1), 63-99.
16- Kwiatkowski, D, Phillips, P.C.B, Schmidt, P, and Shin, Y, (1992), "Testing the null hypothesis of stationary against the alternative of a unit root: how sure are we that economic time series have a unit root?" Journal of Econometrics, 54, 159-178.
17- Lee, J and Strazicich, M.C, (2003), "Minimum Lagrange Multiplier Unit Root Test with Two Structural Breaks," The Review of Economics and Statistics, 85(4), 1082-1089.
18- Lee, H.A, Lim, K.P, and Azali, M, (2005), "Income Disparity between Japan and ASEAN-5 Economies: Converge, Catching up or Diverge?", Economics Bulletin, 6(13), 1-20.
19- Li, Q and Papell, D, (1999), "Convergence of international output: time series evidence for 16 OECD countries," International Review of Economics and Finance, 8, 267-280.
20- Loewy, M and Papell, D, (1996), "Are U.S. Regional Incomes Converging? Some Future Evidence," Journal of Monetary Economics, 38, 587-598.
21- Lumsdaine, R and Papell, D, (1997), "Multiple trend breaks and the unit-root hypothesis," Review of Economic Statistic, 79, 12–218.
22- Phillips, P.C.B and P. Perron, (1988), "Testing for a Unit Root in Time Series Regression," Biometrika, 75, 335–346.
23- Sollis, R, (2009), " A simple unit root test against asymmetric STAR nonlinearity with an application to real exchange rates in Nordic countries," Economic Modelling, 26, 118–25.
24- Strazicich, M. C., Lee, J., and Day, E. (2004), "Are incomes converging among OECD countries? Time series evidence with two structural breaks," Journal of macroeconomics, 26, 131–145.
25- Sul, D, Phillips, P.C.B and Choi, C.Y, (2005), " Prewhitening bias in HAC estimation," Oxford Bulletin of Economic Statistics, 67, 517–546.
26- Taylor, A.R. and Busetti, F, (2003), "Testing against stochastic trend in the presence of variance shifts," Journal of Business and Economic Statistics, 21, 510-531.
27- Tomljanovich, M and Vogelsang, T.J, (2002), "Are U.S. Regions Converging? Using New Econometric Methods to Examine Old Issues," Empirical Economics, 27, 49-62.
28- Vogelsang, T.J and Perron, P, (1998), "Additional Tests for a Unit Root Allowing for a Break in the Trend Function at an Unknown Time," International Economic Review, 39(4), 1073-1100.
29- Westerlund, J, (2009), "A Panel Unit Root Test with Multiple Endogenous Breaks," Working Papers in Economics, University of Gothenburg.
30- Zivot, E., Andrews, D.W.K, (1992), "further evidence of the great crash, the oil price shock and the unit root hypothesis," Journal of Business and Economic Statistics, 10, 251–270.