AXELSSON, O., LUKÁŠ, D., NEYTCHEVA, M. An exact schur complement method for time-harmonic optimal control problems. In: LIRKOV, I., MARGENOV, S., eds. Lecture Notes in Computer Science. Large-Scale Scientific Computing. Vol. 13127. Cham: Springer Nature Switzerland AG, 2022, s. 91-100. ISBN 978-3-030-97548-7. ISSN 0302-9743. E-ISSN 1611-3349. Dostupné z: https://doi.org/10.1007/978-3-030-97549-4_10.