Unless I'm missing something the contents given by ChessBase don't seem to cover 4.Bb5 Bc5. Does anybody know any different ? This would seem odd as it is the recommended line in several repertoire books.
Rocket Repertoire: The Four Knights  1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 01: Introduction [10:56] Symetrical Variation: 4.Bb5 Bb4 5.00 00 02: 6.d3 d6 7.Bg5 Bxc3 8.bxc3 Qe7 Game 1 Cheparinov,I  Jakovenko,D [16:40] 03: 6.d3 d6 7.Bg5 Ne7 8.Bxf6 gxf6 9.d4 c6 Game 2 Gurevich,D  Mikhalevski,V [10:50] 04: 6.d3 d6 7.Ne2 Ne7 8.c3 Ba5 9.Ng3 Sg6 10.d4 Bb6 Game 3 Anand,V  Mamedyarov,S [11:00] Rubinstein Variation: 4.Bb5 Nd4 05: 5.Ba4 c6 6.Nxe5 d5/d6 Game 4 Wei Yi  Rodshtein,M [22:10] 06: 5.Ba4 Bc5 6.Nxe5 00 7.Nd3 Bb6 8.e5 c6 Game 5 Motylev,A  Carlsen,M [10:19] 07: 5.Ba4 Bc5 6.Nxe5 00 7.Nd3 Bb6 8.e5 Ne8 Game 6 Morozevich,A  Svidler,P [15:00] 08: 5.Nxd4 exd4 6.e5 dxc3 7.exf6 Qxf6 8.dxc3 Bc5/c6/Qe5+ Game 7 Short,N  Kramnik,V [17:43] 09: 4...Bd6 5.00/d3 Game 8 Carlsen,M  Aronian,L [11:09] 10: 5.Nxe5 Nxb5/Qe7 Game 9 Short,N  L'Ami,E [12:21] Four Knights Scotch Variation: 4.d4 exd4 5.Nxd4 11: 5...Bb4 6.Nxc6 bxc6 7.Bd3 00 8.00 d5 9.exd5 cxd5 10.Bg5 c6 Game 10 Morozevich,A  Kramnik,V [15:20] 12: 5...Bb4 6.Nxc6 bxc6 7.Bd3 00 8.00 d5 9.exd5 cxd5 10.h3 c6 Game 11 Wang,H  Anand,V [16:23] 13: 5...Bc5 6.Be3 Bb6 7.Qd2 00 8.000 Re8 9.f3 d5 Game 12 Kramnik,V  Aronian,L [13:36] 14: 4...Bb4 and 4...exd4 5.Nxd4 Bb4 6.Nxc6 bxc6 7.Bd3 00 8.00 Re8 9.Qf3 Rb8 Game 13 Karjakin,S  Aronian,L [19:01] Interesting ideas 15: 4.d4 exd4 5.Nd5 Nb4/Be7/Nxd5/Nxe4 Game 14 Polovodin,I  Zaitsev,I [18:36] 16: 4.Be2 Game 15 Mihok,O  L'Ami,E [04:48] 17: 4.Nxe5 Nxe5 5.d4 Halloween Gambit Game 16 Klepaczka,T  Olszewski,M [05:44] 18: 4.a3 g6 5.Nxe5 Nxe5 6.d4 Nc6 7.d5 Nb8/Ne5 Game 17 Jones,G  Bae,T [09:24] 19: 4.a3 d5/Be7/Bc5 Game 18 Short,N  Wang Yue [05:51] 20: Various 3rd move options for Black: 3...Bc5/g6/d6/f5 Game 19 Motwani,P  Bathie,N [09:16] 21: 2...Nf6 3.Nc3 Bc5 4.Nxe5 and Conclusion [06:46]
