1. Breitenstein , W.; Cottens, S.; Ehrhardt, C.; Jacoby, E.; Lorthiois, E. L. J.; Maibaum, J. K.; Ostermann, N.; Sellner, H.; Simic, O. WO 2006066896 2006, CAN, 145:103533.
2. Baldwin, J. J.; Claremon, D. A.; Tice, C. M.; Cacatian, S.; Dillar, L. W.; Ishchenko, A. V.; Yuan, J.; Xu, Z.; Mcgeehan, G.; Zhao, W.; Simpson, R. D.; Singh, S. B. WO 2007117559A2 2007, CAN, 147:469236.
3. Quantitative Structure-Activity Relationships of Antibacterial Agents, 7-Heterocyclic Amine Substituted 1-Cyclopropyl-6,8-difluoro-4-oxoquinoline-3-carboxylic Acids.
4. Synthesis and Structure-Activity Relationships of 7-(3'-Amino-4'-methoxypyrrolidin-1'-yl)-1-cyclopropyl-6,8-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic Acids.
5. Schenke, T.; Krebs, A.; Petersen, U. 1993, DE 4200415 A1, CAN, 119:271179.