Particle methods for optimal filter derivative: application to parameter estimation. - George Poyiadjis; Arnaud Doucet; Sumeetpal S. Singh (ICASSP (5), 2005)

Gradient-free maximum likelihood parameter estimation with particle filters. - George Poyiadjis; Sumeetpal S. Singh; Arnaud Doucet (ACC, 2006)

Particle Filter as A Controlled Markov Chain For On-Line Parameter Estimation in General State Space Models. - George Poyiadjis; Sumeetpal S. Singh; Arnaud Doucet (ICASSP (3), 2006)