On Napoleon's theorem in the isotropic plane. - Horst Martini; Margarita Spirova (Period. Math. Hung., 2006)

Circle geometry in affine Cayley-Klein planes. - Horst Martini; Margarita Spirova (Period. Math. Hung., 2008)

On regular 4-coverings and their application for lattice coverings in normed planes. - Horst Martini; Margarita Spirova (Discret. Math., 2009)

On a theorem of G. D. Chakerian. - Margarita Spirova (Contributions Discret. Math., 2010)

Visibility in crowds of translates of a centrally symmetric convex body. - Javier Alonso 004; Horst Martini; Margarita Spirova (Eur. J. Comb., 2010)

Minimal enclosing discs, circumcircles, and circumcenters in normed planes (Part I). - Javier Alonso 004; Horst Martini; Margarita Spirova (Comput. Geom., 2012)

Minimal enclosing discs, circumcircles, and circumcenters in normed planes (Part II). - Javier Alonso 004; Horst Martini; Margarita Spirova (Comput. Geom., 2012)

The Fermat-Torricelli Problem, Part I: A Discrete Gradient-Method Approach. - Yaakov S. Kupitz; Horst Martini; Margarita Spirova (J. Optim. Theory Appl., 2013)

Illuminating and covering convex bodies. - Horst Martini; Christian Richter; Margarita Spirova (Discret. Math., 2014)

On bisectors in normed planes. - Thomas Jahn; Margarita Spirova (Contributions Discret. Math., 2015)

Ball hulls, ball intersections, and 2-center problems for gauges. - Pedro Martín; Horst Martini; Margarita Spirova (Contributions Discret. Math., 2017)