USLB:10.1300/J022v02n02_02
USLB:10.1300/J022v19n03_05
USLB:10.1300/J079v32n02_04
USLB:10.1300/J104v45n03_02
USLB:10.1300/J113v26n01_07
USLB:10.1300/J146v12n03_b
USLB:10.1300/J148v05n03_03
USLB:10.1300/J294v03n02_12
USLB:10.1300/J399v01n01_02
USLB:10.1300/J490v20n03_05
USLB:10.1300/J490v21n03_04