26,1=38,19; 26,2=39,18; 27,1=42,17; 27,2=43,19; 27,3=45,22; 27,4=46,20; 28,1=47,11; 28,2/3=49,17; 28,4=51,6; 29,1=52,21; 29,2=53,27; 29,3=54,23; 29,4=55,27; 29,4,Suppl.=55,17 von: University of Colorado Boulder: University of Colorado bulletin
26,1=423; 26,2=442; 27,3=565; 27,4=585; 28,2/3=651; 28,4=689; 29,1=726; 29,2=763; 29,3=793; 29,4=832 von: University of Colorado Boulder: [University of Colorado bulletin / General series]