#### Table of contents

Bulg. J. Phys. vol.**51** no.1 (2024)

**Introduction**

Thomas Curtright, Eduardo Guendelman, Peter West

pp. 001-004, [abs, pdf]

**MOND & Retarded Gravity**

Asher Yahalom

pp. 005-020, [abs, pdf]

**Inversion Invariant Volume Element for Strings, Antistrings and Braneworlds**

Eduardo Guendelman

pp. 021-041, [abs, pdf]

**New Type of Traversable Wormhole**

Frans R. Klinkhamer

pp. 042-059, [abs, pdf]

**The Vacuum Energy Problem in Quantum Gravity and the Masses of Elementary Particles**

Djordje Minic

pp. 060-071, [abs, pdf]

**Muonic Kaon and the Kaon Size**

David A. Owen

pp. 072-077, [abs, pdf]

**Newtonian Gravity on an**

*N*-SphereT. Curtright, H. Alshal

pp. 078-089, [abs, pdf]

**Geometric Cloaks and Resonances**

T. Curtright, S. Subedi

pp. 090-103, [abs, pdf]

**Scale Invariant Scattering in 2D**

Thomas Curtright, Christophe Vignat

pp. 104-108, [abs, pdf]

**Lie Groups and Propagators Exemplified**

T.L. Curtright, Z. Cao, A. Peca, D. Sarker, B.D. Shrestha

pp. 109-116, [abs, pdf]