by Harizanov, S., Lazarov, R., Margenov, S., Marinov, P., Vutov, Y.
Published in Numerical linear algebra with applications (01.10.2018)

by Efendiev, Y., Galvis, J., Lazarov, R., Moon, M., Sarkis, M.
Published in Journal of computational physics (15.12.2013)

by Iliev, O., Lazarov, R., Willems, J.
Published in Multiscale modeling & simulation (01.10.2011)

by Lazarov, R, Mihaylova, I.M, Spasova, Z.S, Minchev, T.M
Published in Radiotherapy and oncology (2014)

by Kachiashvili, K., Gordeziani, D., Lazarov, R., Melikdzhanian, D.
Published in Applied mathematical modelling (01.07.2007)

by Tsenov, P, Iliev, L, Antonova, A, Payanova, I, Djankova, N, Stoyanova, E, Vesselinova, A, Lazarov, R
Published in Radiotherapy and oncology (01.04.2015)

by Payanova, I, Tsenov, P, Antonova, A, Iliev, L, Spassova, E, Djankova, N, Vesselinova, A, Lazarov, R, Avgerinova, D
Published in Radiotherapy and oncology (01.04.2015)

by Payanova, I, Georgiev, R, Lazarov, R, Spasova, Z, Ivanov, V, Iliev, L, Tsenov, P, Antonova, A, Georgieva, T, Georgieva, S, Avgerinova, D
Published in Radiotherapy and oncology (01.04.2016)

by C. Carstensen, Lazarov, R., S. Tomov
Published in SIAM journal on numerical analysis (01.01.2005)

by Ewing, R, Iliev, O, Lazarov, R, Rybak, I, Willems, J
Published in SIAM journal on scientific computing (01.01.2009)

by Mihaylova, I, Parvanova, V, Tchakarova, A, Velikova, N, Katzarov, D, Lazarov, R
Published in Radiotherapy and oncology (01.03.2013)

by Andreev, A.B., Lazarov, R.D., Racheva, M.R.
Published in Journal of computational and applied mathematics (15.10.2005)

by Mihaylova, I, Parvanova, V, Dimitrova, N, Kurteva, G, Lazarov, R
Published in Radiotherapy and oncology (2011)

by Lazarov, R, Mihaylova, I, Gesheva-Atanasova, N, Bakardjiev, S
Published in Radiotherapy and oncology (2011)

by P. Chatzipantelidis, Lazarov, R. D.
Published in SIAM journal on numerical analysis (01.01.2005)

by Lazarov, R, Mihaylova, I, Ivanova, D, Lazarova, S, Spasova, Z, Piperkova, E, Tzonevska, A, Tzvetkov, K
Published in Radiotherapy and oncology (01.05.2012)

by Cai, Z., Lazarov, R., Manteuffel, T. A., McCormick, S. F.
Published in SIAM journal on numerical analysis (01.12.1994)

by Lazarov, R. D., Mishev, Ilya D., Vassilevski, P. S.
Published in SIAM journal on numerical analysis (01.02.1996)

by CHATZIPANTELIDIS, P, LAZAROV, R. D, THOMEE, V, WAHLBIN, L. B
Published in BIT (Nordisk Tidskrift for Informationsbehandling) (01.11.2006)

by Chatzipantelidis, P., Lazarov, R. D., Thomée, V.
Published in Numerical methods for partial differential equations (01.09.2004)