Boundary conditions as Dirac constraints MM Sheikh-Jabbari, A Shirzad The European Physical Journal C-Particles and Fields 19, 383-390, 2001 | 106 | 2001 |

Holographic subregion complexity for singular surfaces E Bakhshaei, A Mollabashi, A Shirzad The European Physical Journal C 77 (10), 1-17, 2017 | 47 | 2017 |

Gauge symmetry in Lagrangian formulation and Schwinger models A Shirzad Journal of Physics A: Mathematical and General 31 (11), 2747, 1998 | 33 | 1998 |

Classification of constraints using the chain-by-chain method F Loran, A Shirzad International Journal of Modern Physics A 17 (05), 625-642, 2002 | 31 | 2002 |

On 3D minimal massive gravity M Alishahiha, MM Qaemmaqami, A Naseh, A Shirzad Journal of High Energy Physics 2014 (12), 1-15, 2014 | 29 | 2014 |

Explicit form of the gauge transformation generator in terms of constraints A Shirzad, MS Moghadam Journal of Physics A: Mathematical and General 32 (46), 8185, 1999 | 25 | 1999 |

Batalin-Fradkin-Tyutin method for mixed constrained systems and Chern-Simons theory M Monemzadeh, A Shirzad Physical Review D 72 (4), 045004, 2005 | 23 | 2005 |

Finite order BFFT method M Monemzadeh, A Shirzad International Journal of Modern Physics A 18 (30), 5613-5625, 2003 | 23 | 2003 |

The BFT method with chain structure A Shirzad, M Monemzadeh Physics Letters B 584 (1-2), 220-224, 2004 | 14 | 2004 |

Constraint structure of the three dimensional massive gravity M Sadegh, A Shirzad Physical Review D 83 (8), 084040, 2011 | 13 | 2011 |

The reduced phase space of an open string in the background B-field M Dehghani, A Shirzad The European Physical Journal C-Particles and Fields 48, 315-325, 2006 | 11 | 2006 |

Constraint structure in modified Faddeev–Jackiw method A Shirzad, M Mojiri Modern Physics Letters A 16 (38), 2439-2448, 2001 | 11 | 2001 |

Symplectic quantization of massive bosonic string in background B-field A Shirzad, A Bakhshi, Y Koohsarian Modern Physics Letters A 27 (13), 1250073, 2012 | 10 | 2012 |

Perfect and imperfect gauge fixing A Shirzad arXiv preprint hep-th/0609145, 2006 | 10 | 2006 |

On the classification of consistent boundary conditions for -gravity H Khodabakhshi, F Shojai, A Shirzad The European Physical Journal C 78, 1-10, 2018 | 7 | 2018 |

Massive gravity, canonical structure and gauge symmetry Z Molaee, A Shirzad Nuclear Physics B 933, 248-261, 2018 | 7 | 2018 |

Gauge Fixing in the Chain-by-Chain Method A Shirzad, F Loran International Journal of Modern Physics A 17 (31), 4801-4808, 2002 | 7 | 2002 |

The difficulty of symplectic analysis with second class systems A Shirzad, M Mojiri Journal of mathematical physics 46 (1), 012702, 2005 | 6 | 2005 |

Hamiltonian structure of bi-gravity, problem of ghost and bifurcation Z Molaee, A Shirzad Classical and Quantum Gravity 36 (22), 225005, 2019 | 5 | 2019 |

New bi-gravity from new massive gravity A Akhavan, M Alishahiha, A Naseh, A Nemati, A Shirzad Journal of High Energy Physics 2016 (5), 1-24, 2016 | 5 | 2016 |