Beukers, F. (1979). The generalised Ramanujan-Nagell equation. s.n..
Citación estilo ChicagoBeukers, Frits. The Generalised Ramanujan-Nagell Equation. [S.l.: s.n., 1979.
Cita MLABeukers, Frits. The Generalised Ramanujan-Nagell Equation. s.n., 1979.
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