Bäcklund transformations for first and second Painlevé hierarchies. Sakka, Ayman Hashem (2009) SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]
Bessel's differential equation and its Hyers-Ulam stability. Kim, Byungbae, Jung, Soon-Mo (2007) Journal of Inequalities and Applications [electronic only]
Birational canonical transformations and classical solutions of the sixth Painlevé equation Humihiko Watanabe (1998) Annali della Scuola Normale Superiore di Pisa - Classe di Scienze
Boutroux's method vs. re-scaling. Lower estimates for the orders of growth of the second and fourth Painlevé transcendents. Steinmetz, Norbert (2004) Portugaliae Mathematica. Nova Série