@article {2004_pur_e,
   author = {Dmitriev, V. V. and Zavjalov, V. V. and Zmeev, D. Ye. and Levitin, L. V.},
   title = {{Purification of $^3$He from a $^4$He Impurity Using Adsorption}},
   journal = {Instruments and Experimental Techniques},
   publisher = {MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.},
   issn = {0020-4412},
   keyword = {Chemistry and Materials Science},
   pages = {567-569},
   volume = {47},
   issue = {4},
   url = {http://dx.doi.org/10.1023/B:INET.0000038411.46876.ed},
   note = {10.1023/B:INET.0000038411.46876.ed},
   year = {2004}
   keys={IPP}
}