Jacek Stachiewicz interview with Major Wacław Kopisto (2 August 1990), "Kim jest Martin Gray?" (Who is Martin Gray)Nowiny Rzeszowskie (The Rzeszów News daily), Nr 163, 1990, p. 9 of scanned document, Scribd Inc. Also at: Polish daily Nowiny Rzeszowskie, DJVU Lizardtech viewer. Nr 162-183.Podkarpacka Digital Library.
Cezary Chlebowski (31 August 2013). "W Wachlarzu". 900 dni Ponurego. Rzeczpospolita. Retrieved 20 April 2014.
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Jacek Stachiewicz interview with Major Wacław Kopisto (2 August 1990), "Kim jest Martin Gray?" (Who is Martin Gray)Nowiny Rzeszowskie (The Rzeszów News daily), Nr 163, 1990, p. 9 of scanned document, Scribd Inc. Also at: Polish daily Nowiny Rzeszowskie, DJVU Lizardtech viewer. Nr 162-183.Podkarpacka Digital Library.
S.B.P.L. "Wacław Kopisto". Słownik biograficzny powiatu łańcuckiego. Archived from the original on 19 April 2014. Retrieved 19 April 2014 – via Internet Archive.{{cite web}}: CS1 maint: unfit URL (link)