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*100  $aLingefjärd, Thomas$_165993600
*245  $aMatematiska undersökningar med fria programvaror
*300  $aS. 36-38, 44 : ill.
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*650  $afri programvare$9nor$2norart$_128801000
*650  $agratisprogrammer$9nor$2norart$_130867500
*700  $aJönsson, Per$_159662900
*773  $tTangenten$gÅrg. 20, nr. 2 (2009)$x0802-8192$w(NO-LaBS)552650(tnr)
*999  $z900451245$anorart:900451245
^