- Byron Swift, Environmental Law Institute, Allowance Trading and Potential Hot Spots-Good News from the Acid Rain Program 31 Environment Reporter, pp. 954-959, May 12,2000
ଏସିଡ୍ ବର୍ଷା କାର୍ଯ୍ୟକ୍ରମ ପାଇଁ ଭତ୍ତା କାରବାର ଭଲ।