I found also a thread in the Magic Cafe with some other versions of the effect: [1] Aldrich, St.: Aldrich Hofzinser Ace Trick in The Linking Ring, vol.71, no.6, 1991, p.75 [2] Avis, J.: The "Lost Ace" Trick in Fulves,K.: Epilogue #11, March 1971, p.1 [3] Bengel,R.: One-Shot Hofzinser; Apocalypse, vol.12, no.9, 1989, p.1687 [4] Britland,D.: Tell Tale Aces in Magigram, vol.9, no.1, 1976 "Ganson's Teach In" [5] Busby, J.: Cased Prediction, 1978 [6] Chesbro/West: Flipper in Tricks You Can Count On, 1970, p.25 [7] Christensen, J.L.: Pyramide Aces in Pabular vo.3, no.12, 1977, p.447 [8] Cyprian Fr.: New Hofzinser Four Aces in Father Cyprian's Lecture Notes #11, 1989, p.29 [9] Cyprian,Fr. Hofzinser-70 in Epilogue #17, 1973, p.7 [10] Cyprian,Fr.: Fr.Cyprian on the Hofzinser Card Problem, Fulves 1978 [11] Cyprian,Fr.: Hats Off To Hofzinser in Father Cyprian's Lecture Notes #11, 1989, p.28 [12] Cyprian,Fr.: Hofzinser's Departure in Garcia,F.: The Elegant Card Magic of Father Cyprian, 1980, p.54 [13] Duffie, P.: Hofzinser's Alternative in Sadewitz/Duffie: Inspirations, 1987, p.98 [14] Duffie,P.: Hofzinser In My Pocket in Duffie/Sadowitz: Alternative Card Magic, 1982, p.22 verwandelt! Stets verwandelt sich das As der gew„hlten Farbfamilie in die gew„hlte Karte.® [15] Edwards, D.: Half-Shot Hofzinser; Apocalypse, vol.12, no.10, 1989, p.1703 [16] Elmsley, A.: Bare-Aced Hofzinser in Minch,St.: The Collected Works of Alex Elmsley, Vol.I, 1991, p.253 [17] Elmsley, A.: Hoftwister in Minch,St.: The Collected Works of Alex Elmsley, Vol.I, 1991, p.49 [18] Fare, J.: Criss Cross Triumph in fare,J.: Card Tricks French Stile, 1977, p.32 [19] Fulves,K.: Dollar Hofzinser in Fulves,K.: And A Pack Of Cards, 1989, p.24 [20] Fulves,K.: In Re Hofzinser; Fulves,K.acket Switches (Part Five), 1977, p.294 [21] Fulves,K.: The Red Backed Hofzinser in Fulves,K.: Packet Switches, Part One, 1971 p.8 [22] Fulves,K.: Two Unsolved Problems in Pallbearers Review, 3rd Folio, Winter 1969, p.299 and 302 [23] Giobbi, R.: Hofzinser's Aces in MAGIE (MZvD) vol.67, 1987, p.108 [24] Goldstein, Ph.: Twisted Hofzinser, in Linking Ring, vol.68, no.9, 1988, p.104 [25] Hartman,J.: Hof Zingers (Optionzer - Ringer - About Face - One Stop Swapping - Elastic Ace - Over and Over and Out) in Hartman,J.: Card Craft, 1991, pp.253-271 [26] Hartmann,J.: Hof Zingers (=Hotfinger - Face Lift - Ringer - Final Solution) in Hartmann Packet Magic, 1972, pp.31-37 [27] Higham, J.: Hofzinser Triumphs In One Shuffle; Higham,J.: Technomagic, 1990, p.67 [28] Jennings, L.: Hofzinser Ace Problem in Patton/Vergillo. A Visit With Larry Jennings, 1982, p.3 [29] Jennings,L.: A Problem with Hofzinser in Maxwell,M.: The Classic Magic of Larry Jennings, 1986, p.17 [30] Jennings,L.: Tell-Tale Aces in Ganson,L.ai Vernon's Ultimate Secrets of Card Magic, 1967, p.49 [31] Kaufman,R.: The Hofzinser Ace Tunnel, Kaufman,R.:The New York Magic Symposium Close-Up Collection One, 1982, p.71 [32] Lees, W.:Hofzinser/Jennings in Lees,W.: More Professional Card Tricks, 1981, p.21 [33] Marlo,E.: Choice Transposition in The New Tops, vol.5 no.11, 1965, p.37 [34] Marlo,E.: Marlo's Third Solution To Hofzinser's Card Problem in Racherbaumer,J.: Cardfixes, 1990, p.55 [35] McCarthy, D.: No Shuffle Hofzinser Aces; McCarthy, D.: The Underground Hits The Bottom, 1984, p.45 [35] McCarthy, D.: One Shuffle Hofzinser Aces; McCarthy,D.: The Underground Hits The Bottom, 1984, p.43 [36] McCarthy,D.: Another Hofzinser Aces, in McCarty,D.: Sly Glances, 1991, p.29 [37] Nelson,B.: Jennings Improved in Mandoza,F.J.: The Book Of John, 1978, p.119 [38] Racherbaumer,J.: A Case For Hofzinser in Racherbaumer,J.: Cardfixes, 1990, p.50 [39] Racherbaumer,J.: About the so-called Hofzinser Problem in Racherbaumer,J.: Arch Triumphs, 1978, p.8 [40] Racherbaumer,J.: Decking Hofzinser in MUM vol.67, no.4, 1977, p.16 [41] Racherbaumer,J.: Decking Hofzinser Delux in Apocalypse, vol.1, no.3, 1978, p.27 [42] Racherbaumer,J.: Hofzinser Triumphs in Racherbaumer,J.: Arch Triumphs, 1978, p.6 [43] Sanvert,J.J.: Another Hofzinser Twist, Apocalypse vol.5, no.10, p.687 [44] Simon, F.: Hot Zinger in Simon,F.: Versatile Card Magic 1983, p.134 [45] Solomon, D.: Triumphant Aces in Racherbaumer,J.: Arch Triumphs, 1978, p.10 [46] Swinford,P.: Three Different Ways in Fulves,K.:Epilogue #9, July 1970, p.3 [47] Tropeano, D.: Hofzinser Triumphs!; Apocalypse, vol.7, no.6, 1984, p.928 [48] Walton, R.: Grown Up Hofzinser in Walton,R.: That Certain Something, 1979, p.2 [49] Warlock/Haxton/Ryland/Kort: Platform Hofzinser in The New Pentagram vol.2, no.10, 1970, p.81; vol.3, no.2, 1971, p.13;, vol4, no.4, p.30 [50] Yedid, M.: Sandwichange For Hofzinser, Apocalypse, vol.15, no.5, 1992, p.2071