In particular, I found useful two law review articles published shortly after enactment of the mixed collateral statute: J.Hetland and C. Hansen, The "Mixed Collateral" Amendments to California's Commercial Code - - Covert Repeal of California's Real Property Foreclosure and Antideficiency Provisions or Exercise in Futility?, 75 Calif. L. Rev. 185 (1987), and a blistering reply in M.Hirsch, et.al., The U.C.C. Mixed Collateral Statute--Has Paradise Really Been Lost?, 36 U.C.L.A. L. Rev.1 (1988).