Kuusisto-Arponen, Anna-Kaisa (2001). “The end of violence and introduction of 'real' politics: Tensions in peaceful Northern Ireland”. Geografiska Annaler: Series B, Human Geography (Blackwell Publishing) 83 (3): 121–130. doi:10.1111/j.0435-3684.2001.00100.x. JSTOR491073.
Johnson, James H. (1957). “The population of Londonderry during the Great Irish Famine”. The Economic History Review (Blackwell Publishing) 10 (2): 273–285. doi:10.2307/2590863. JSTOR2590863.
Kuusisto-Arponen, Anna-Kaisa (2001). “The end of violence and introduction of 'real' politics: Tensions in peaceful Northern Ireland”. Geografiska Annaler: Series B, Human Geography (Blackwell Publishing) 83 (3): 121–130. doi:10.1111/j.0435-3684.2001.00100.x. JSTOR491073.
Johnson, James H. (1957). “The population of Londonderry during the Great Irish Famine”. The Economic History Review (Blackwell Publishing) 10 (2): 273–285. doi:10.2307/2590863. JSTOR2590863.
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Library Ireland – Sketches of Olden Days in Northern Ireland