4,427
edits
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|2<sup>nd</sup> (1965) Culham, UK|| || | |2<sup>nd</sup> (1965) Culham, UK|| || | ||
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|3<sup>rd</sup> (1968) Novosibirsk, USSR|| || | |3<sup>rd</sup> (1968) Novosibirsk, USSR|| ||[http://dx.doi.org/10.1070/PU1969v012n01ABEH003921 Sov. Phys. Usp. '''12''' (1969)] | ||
|- | |- | ||
|4<sup>th</sup> (1971) Madison, USA|| || | |4<sup>th</sup> (1971) Madison, USA|| || |