McLachlan, Robert I., and Christian Offen. “Hamiltonian Boundary Value Problems, Conformal Symplectic Symmetries, and Conjugate Loci.”10.53733/34 __New Zealand Journal of Mathematics, vol. 48, 2018, pp. 83–99, doi:10.53733/34 .
LibreCat: /record/19943
DOI: 10.53733/34 
arXiv: 1804.07479